Abstract: A viewfinder apparatus includes an objective lens unit, an eyepiece unit, an image display element for displaying an image formed by an image pick-up element, an illuminating device for illuminating the image display element, an optical system for introducing a light ray from the image display element illuminated by the illuminating device backward, and a reflecting member for introducing a light ray from the optical system to the eyepiece unit, and wherein the values of a focal length fr of the optical system and a focal length fe of the eyepiece unit satisfy the condition 1<fe/fr<6.

Abstract: A real image mode finder optical system includes an objective optical system with a positive refracting power, an image erecting optical system having a plurality of reflecting sections for erecting an image formed by the objective optical system, and an ocular optical system for introducing an erected image into an observer's eye. At least one lens of the objective optical system or the ocular optical system is configured to be rotational asymmetrical with respect to the optical axis, and a light-blocking member for blocking reflected light at the end face of the lens is provided adjacent to the lens or spaced away therefrom through air.

Abstract: An adjustable viewfinder optical system for a shoulder-supported movie or video camera having interchangeable objective lenses. The system includes first and second lens groups aligned on an optical axis for receiving and relaying an image received from the objective lens of the camera to the viewer's eye. The first lens group is in a forwardly extending portion of the viewfinder that is pivotally joined to a rearwardly extending portion of the viewfinder containing the second lens group. The forwardly extending portion has a telescoping portion for varying the eye position of the viewer relative to the camera in the fore-and aft direction. The light is collimated between the first and second lens groups at the telescoping portion, whereby the image viewed in the viewfinder remains in focus and the same magnification throughout the telescoping adjustment movement.

Abstract: This finder unit is configured such that [it comprises] an objective optical system for forming a viewing image, an inverting optical system for making the viewing image formed by the objective optical system an erecting normal image, an eyepiece optical system for viewing the viewing image, a first optical component deployed closer to the objective optical system than the viewing image formation position is, and a second optical component deployed closer to the eyepiece optical system than the viewing image formation position is; and satisfies the condition

Abstract: An inverse Galilean view finder has an object lens and an eyepiece lens. The front of the object lens is flat surface. First micro corner cube prisms are arranged in a frame of visual field around the external periphery of the flat surface. Second micro corner cube prisms are arranged in a frame on the rear surface of the eyepiece lens. Light from an object is reflected toward the object lens by the second micro corner cube prisms. Reflective light from the second micro corner cube prisms is reflected by the first micro corner cube prisms, and returns to the eyepiece lens. The reflective light of the first micro corner cube prisms brights and it is observed within a finder as a finder field frame indicating a range of photography.

Abstract: Disclosed is a finder optical system that is provided with a relay optical system that forms a second image by erecting an inverted first image formed on a first image plane through a taking leas of a camera, and a magnifying optical system through which the second image is observed under magnification. The relay optical system includes a condenser lens, a reflecting prism and a relay lens arranged in the order from the first image plane toward an eyepoint. The following conditions (1) and (2) are satisfied; (1) 0.25<|mr|<0.35 (2) 0.75<f2/f3<0.85 where, mr is magnification of the relay optical system, f2 is a focal length of the relay lens, and f3 is a focal length of the magnifying optical system.

Abstract: An inverted Galilean finder is composed of an objective lens of a negative power and an eyepiece of a positive power, which are formed from a polystyrene resin by injection molding. The objective lens has a concave surface oriented to the eyepiece, and the eyepiece has a convex surface oriented to the objective lens.

Abstract: A finder unit includes an objective optical system for forming a viewing image, an inverting optical system for making the viewing image formed by the objective optical system an erecting normal image, an eyepiece optical system for viewing the viewing image, a first optical component deployed closer to the objective optical system than the viewing image formation position and a second optical component deployed closer to the eyepiece optical system than the viewing image formation position and satisfies the condition 8<1000×(D1+D2)/f2(1/m) when the focal length of the eyepiece optical system is represented as f (mm), the distance from the viewing image formation position to the first optical component as D1(mm), and the distance from the viewing image formation position to the second optical component as D2 (mm).

Abstract: An inverse Galilean view finder has an object lens and an eyepiece lens. The front of the object lens is flat surface. First micro corner cube prisms are arranged in a frame of visual field around the external periphery of the flat surface. Second micro corner cube prisms are arranged in a frame on the rear surface of the eyepiece lens. Light from an object is reflected toward the object lens by the second micro corner cube prisms. Reflective light from the second micro corner cube prisms is reflected by the first micro corner cube prisms, and returns to the eyepiece lens. The reflective light of the first micro corner cube prisms brights and it is observed within a finder as a finder field frame indicating a range of photography.

Abstract: A real-image variable-magnification viewfinder includes objective optical system having positive optical power, eyepiece optical system having positive optical power, and erecting optical system. The objective optical system has first lens unit having positive optical power, second lens unit having negative optical power, and third lens unit having positive optical power. As zooming is performed from wide-angle end to telephoto end, second and third lens units are moved so they come closer to each other. Following conditional formulae are fulfilled: −0.75<m2W<−0.3, −2<m2T<−1.05, −0.75<m3W<−0.3, −2<m3T<−1.05, l2>l3, where m2W and m2T represents lateral magnification of second lens unit at wide-angle end and at telephoto end, m3W and m3T represents lateral magnification of third lens unit at wide-angle end and at telephoto end, and L2 and L3 represent movement distance of second lens unit and of third lens unit over entire zoom range.

Abstract: Disclosed is a finder optical system that is provided with a relay optical system that forms a second image by erecting an inverted first image formed on a first image plane through a taking leas of a camera, and a magnifying optical system through which the second image is observed under magnification. The relay optical system includes a condenser lens, a reflecting prism and a relay lens arranged in the order from the first image plane toward an eyepoint.

Abstract: A single-lens reflex view finder wherein a partial amount of a light bundle transmitting through an imaging optical system which picks up an image of an object is split by optical path splitting means, one of split optical paths is used as a view finder optical path end focus confirming means is disposed only on a central portion of a refracting surface which is disposed at a location of an optional image formed in the view finder optical path.

Abstract: An eyepiece optical system, which is used in a single lens reflex camera having a penta mirror, includes a negative first single lens element, a positive second single lens element, and a negative third single lens element, in this order from the penta mirror; wherein the second single lens element is a diopter adjusting lens element which is adjustable along the optical axis; and the following conditions are satisfied: −2<f1/fe<0  (1) 0.2<f2/fe<0.5  (2) −10<f3/fe<−1  (3) wherein f1 designates the focal length of the first single lens elements; f2 designates the focal length of the second single lens element; f3 designates the focal length of the third single lens element; and fe designates the focal length of the entire eyepiece optical system when the diopter is −1.0.

Abstract: An eyepiece optical system, which is used in a single lens reflex camera having a penta mirror, includes a negative first lens group, a positive second lens group, and a negative third lens group, in this order from the penta mirror; wherein the second lens group is a diopter adjustment lens group which is adjustable along the optical axis direction; and the following conditions are satisfied: −0.8<f1G/fe<−0.2  (1) 0.2<f2G/fe<0.5  (2) −15<f3G/fe<−1  (3) wherein f1G designates the focal length of the first lens group; f2G designates the focal length of the second lens group; f3G designates the focal length of the third lens group; and fe designates the focal length of the entire eyepiece optical system when the diopter is −1.0.

Abstract: A real image finder comprises an objective lens system including a convex lens and having a positive power as a whole, an erect image prism having four reflection surfaces and inverting an inverted image of an object formed through the objective lens system in horizontal and vertical directions, and an eyepiece having a positive power, wherein the erect image prism and the eyepiece lens is integrated by forming an eyepiece surface on the image side of the erect image prism. To provide a fixed magnification finder, the objective lens system consists of a single lens having a positive power and at least one aspherical surface. To provide a zoom finder, the objective lens system comprises a first lens with a negative power and a second lens with a positive power arranged in this order from the object side. The second lens is moved along the optical axis for zooming.

Abstract: A distortion-free and compact image-forming optical system with a minimal number of optical components which provides a wide image area and which is favorably corrected for ray aberrations and arranged in a compact structure by folding an optical path. A pentagonal prism member (5) has a first surface (1), a second surface (2), a third surface (3), and a fourth surface (4). The first surface (1) and the fourth surface (4) are refracting surfaces. The second surface (2) and the third surface (3) are reflecting surfaces. The first surface (1) is formed from a spherical surface. The second surface (2), the third surface (3) and the fourth surface (4) are formed from three-dimensional surfaces. Light rays from an object plane O provided on the back side of a cover glass (6) pass through the cover glass (6) and enter the prism member (5) through the first surface (1). The incident light rays are reflected successively by the second surface (2) and the third surface (3).

Abstract: A camera housing comprises an exterior longitudinal edge that is curved widthwise; a single opening through the exterior longitudinal edge that interrupts the exterior longitudinal edge to create a gap in the exterior longitudinal edge; and an insert having a longitudinal edge that is curved widthwise the same as the exterior longitudinal edge and configured to fit in the opening to align the longitudinal edge of the insert with the exterior longitudinal edge in order that the longitudinal edge of the insert is positioned within the gap to appear to be a continuation of the exterior longitudinal edge, and including a viewfinder window with an exterior flat face that is inclined into the longitudinal edge of the insert to at least partially interrupt the longitudinal edge of the insert in order to prevent the occurrence of image distortion when looking though the viewfinder window in the vicinity of the longitudinal edge of the insert.

Abstract: A diopter adjustment lens is provided with a follower pin on the edge thereof, and is arranged inside a cylinder provided with a guide groove engaging with the follower pin. A diopter adjustment dial, which is integrated with a diopter adjustment ring, is rotatably fitted on the cylinder. The diopter adjustment ring is provided with a cam face, and the follower pin of the diopter adjustment lens is brought into contact with the cam face through the guide groove in the cylinder. Rotating the diopter adjustment dial moves the diopter adjustment lens forward and backward thereby adjusting the diopter of the finder unit.

Abstract: A camera optical system has a photographic optical system and a finder optical system. The photographic optical system has a photographic lens section that receives an optical image from a subject to be photographed and forms an image on a film. The finder optical system has a nonphotographic lens provided integrally with the photographic lens section of the photographic optical system.

Abstract: A branch image pickup and view system includes an objective lens system, an image pickup surface which is adapted to pick up an image formed by the objective lens system, an eyepiece lens system through which an image formed by the objective lens system is viewed, an optical separation system provided behind the objective lens system to split light into a light bundle for the image pickup surface and a light bundle for the eyepiece lens system, a condenser lens provided in the optical path from said optical separation system to said optical eyepiece system to relay the image formed through the objective lens system to the eyepiece lens system, and an optical enlargement system which is provided between the optical separation system and the condenser lens.

Abstract: A one-time-use camera comprising a main body part, a cover part that can be separated at least partially from the main body part, and a viewfinder having a pair of front and rear viewing lenses optically aligned for viewing a subject to be photographed, is characterized in that the cover part is connected to one of the front and rear viewing lenses to move the one viewing lens out of optical alignment with the other viewing lens when the cover part is separated at least partially from the main body part, whereby the one viewing lens can be readily identified to prevent the viewfinder from being erroneously reused. Preferably, the one viewing lens is connected to the main body part in addition to being connected to the cover part in order to hold the cover part to the main body part. A fracture line of weakness exists between the one viewing lens and the main body part which is broken when the one viewing lens is moved out of optical alignment with the other viewing lens.

Abstract: A real image mode zoom finder includes, in order from the object side, an objective optical system with positive refracting power having a first lens unit with negative refracting power, a second lens unit with positive refracting power, a third lens unit with positive refracting power, and a fourth lens unit with negative refracting power; an image erecting system for erecting an intermediate image formed by the objective optical system; and an ocular optical system with positive refracting power. In this case, each of lens units constituting the objective optical system is constructed with a single lens, and the object-side surface of the first lens unit is configured to be concave. Moreover, the objective optical system satisfies the following condition:2.5<.alpha..sub.T(R2) <5.7where .alpha..sub.T(R2) is a combined longitudinal magnification ranging from the second lens unit of the objective optical system to the intermediate image at the telephoto position of the finder.

Abstract: An observation optical system whose eye relief is below 25 mm includes an eyepiece lens having a water absorptive antifogging coating applied on one surface thereof, and a member holding the eyepiece lens. Further, an eyeball-characteristic detecting system includes a light source for illuminating the eyeball of an observer, a light receiving element arranged on detection of the reflected light from the eyeball through the eyepiece to produce a signal, an optical member positioned in the path of the light from the light source to the light receiving element and having an antifogging coating on one surface thereof, and a circuit receptive of the signal for detecting the characteristic of the eyeball.

Abstract: A viewfinder optical system includes, in order from an object side to an observation side, an objective optical system for forming a real image, a first optical member, the first optical member having a reflective surface by which to change a direction in which a light beam from the objective optical system advances, a second optical member, the real image being converted into an erecting image through the first optical member and the second optical member, and an eyepiece optical system for observing the erecting image, wherein the real image is formed on or near an exit surface of the first optical member, and the exit surface of the first optical member is a curved surface convex toward the observation side.

Abstract: A high-performance real-image finder with a zoom objective optical system wherein a power is given to a reflecting surface of an image-inverting optical system to reduce the size in the direction of the thickness, and at the same time, a rotationally asymmetric surface is used in the image-inverting optical system to correct rotationally asymmetric decentration aberrations. The zoom objective optical system Ob has a first lens unit G1 of negative power, a second lens unit G2 of positive power, and a third lens unit G3 of positive or negative power. The real-image finder further includes an image-inverting optical system PP for erecting an intermediate image formed by the objective optical system Ob, and an ocular optical system Oc having a positive refracting power. At least one of reflecting surfaces S.sub.8 and S.sub.

Abstract: A camera which includes a camera body, a rear cover, and a diopter adjusting mechanism having a diopter adjustment lens for a finder optical system, including: a diopter adjustment knob provided on the rear cover; a transmission member connected to the diopter adjustment knob so as to relatively move in the direction along the axis of rotation of the knob and not to relatively rotate thereto ; a biasing spring which biases the transmission member to project toward the camera body side; a lens association rotation member which is supported by the camera body so as to rotate about an axis identical to the axis of the knob and which moves the diopter adjustment lens in the optical axis direction, in accordance with the rotation of the lens association rotation member; and at least one rotation transmission projection and recess provided on one and the other of the transmission member and the lens association rotation member; the transmission member projects to a projected position close to the camera body when t

Abstract: An ocular optical system for a viewfinder in a camera for observing object image which is formed on focusing glass or its vicinity via eye point. The ocular optical system includes, in order from the focusing glass side, a negative meniscus lens, which has its convex surface facing the focusing glass side, and a positive lens. Visibility compensation is performed by moving the positive lens along the optical axis without moving the negative meniscus lens.

Abstract: A viewfinder optical system has a relay optical system and an eyepiece optical system. The relay optical system has a first, a second, and a third relay lens. The eyepiece optical system has a first and a second eyepiece lens. The first eyepiece lens, which is disposed closest to a secondary-image plane formed by the relay optical system has an aspherical surface on its secondary-image plane side.

Abstract: An optical system for a view finder reduced in the overall length without aggravation of the optical performance has a negative power object lens and a positive power eyepiece lens each of which has an asphrical surface at at least one side respectively. The negative power object lens having a concave object side lens surface is comprised of a rectangular-shaped solid lens base with its four corners cut away along periphery of the concave lens surface.

Abstract: An eyepiece lens has a single lens element having a positive optical power, and the single lens element has a refractive power of an aspherical surface and a diffractive power. The eyepiece lens satisfies the following condition:-0.0006<{1 /(fl.multidot..nu.)}+.phi.DOE/.nu.DOE<0.0002where fl represents the focal length resulting from both refractive effect and diffractive effect of the eyepiece lens, .nu. represents the Abbe number of the eyepiece lens, .phi.DOE represents the power resulting from the diffractive effect of the eyepiece lens, and .nu.DOE represents the Abbe-number-equivalent value resulting from the diffractive effect of the eyepiece lens.

Abstract: A variable-magnification image-forming optical system having at least four lens units including a decentered optical system. The decentered optical system has at least one curved surface with a rotationally asymmetric surface configuration having no axis of rotational symmetry in nor out of the surface. Rotationally asymmetric aberrations due to decentration are corrected by the rotationally asymmetric surface configuration. A magnification change is effected by changing at least one of the spacings between the four lens units.

Abstract: A finder system for a single lens reflex camera includes a focusing screen having a split prism, a penta roof mirror and an eyepiece lens system. The penta roof mirror has a hollow housing made of plastic material in the shape of a pentagonal prism whose three surfaces are coated inside to reflect light. The eyepiece lens system includes two plastic lenses, each of which has a different dispersion.

Abstract: In a real-image type optical finder, a positive first lens group (objective lens group), a positive second lens group (relay lens group and image erecting optical system), and a positive third lens group (eyepiece lens group), are included in that order from the object side. The optical system satisfies the following condition (1):5.0<L/f.sub.II <7.0; (1)wherein:L represents the distance between the surface closest to the object side on the first lens group and the surface closest to the user's eye side on the third lens group; andf.sub.II represents the focal length of the second lens group.

Abstract: A variable length telescoping viewfinder for cameras that provides a variably adjustable eye viewing distance relative to the camera without changing the focus or magnification of the scene being photographed throughout the telescoping movement of the viewfinder. The light rays of the real image supplied to the viewfinder directly or indirectly from the camera are passed through a field lens, Pechan prism, relay lens system forming collimated light rays from the fixed front module to the movable rear module wherein lens elements form an intermediate image that is viewed through an eyepiece lens group. The front module is weakly powered and of a substantial effective optical length because of the inclusion of the Pechan prism. The image forming lens group of the rear module is weakly powered whereby relative telescopic movement between the front and rear modules does not adversely affect the location, focus or magnification of the intermediate image throughout the range of movement.

Abstract: Camera finder systems consistent with the present invention, used for observing an object and for use with a camera, include an objective lens system for forming a first image of the object and for magnifying the first image. An inverting optical system inverts the first image received from the objective optical system. Also included is an eyepiece system for observing the inverted image received from the inverting optical system. Further, the camera finder system satisfies the following conditions:12.ltoreq.D.ltoreq.20, and1.0.ltoreq.L/D.ltoreq.4.5,where:D represents a distance between an exit surface of the inverting optical system and an entrance surface of the eyepiece system; andL represents a distance between an entrance surface of the objective optical system and a first image plane.

Abstract: Two cam pins of the variable magnification lens group and the aberration correction lens group are guided by two side walls of one cam groove. Thus, two cam grooves can deal with three movable lens groups, and there is no need to provide three cam grooves. Consequently, the cam cylinder can be short, and thereby the zoom lens apparatus can be compact. A spring applies force to the two cam pins to separate from one another, so that the cam pins can be pressed against the side walls.

Abstract: A one-time-use camera comprising a main body part having a viewfinder chamber with opposite front and rear open ends, and a pair of front and rear viewfinder lens elements that are positioned at the front and rear open ends of the chamber in a spaced optically aligned relation, is characterized in that the front and rear viewfinder lens elements have respective integral extensions that together with the front and rear viewfinder lens elements constitute separate individual L-shaped one-piece lens components which connect to one another to form a rigid rectangular-shaped unit that can be inserted into the chamber through at least one of the front and rear open ends of the chamber to position the front and rear viewfinder lens elements at the front and rear open ends.

Abstract: A finder optical system is provided which is made up of an object lens system and an eyepiece system wherein the object lens system comprises, arranged from the object side:a first lens group, which has a negative lens L.sub.1,a second lens group, which has a positive lens L.sub.2, anda third lens group, which has a negative lens L.sub.3, and has an overall positive refractive power, and whereinthe eyepiece system is used for observing an image formed via the object lens system,the positive lens L.sub.2 of the second lens group in the object lens system has a bi-aspherical surface, andthe magnification of the finder optical system is changed by moving at least the second lens group in the object lens system along the optical axis.

Abstract: In a camera comprising a phototaking lens system and a viewfinder lens system having a different optical axis from that of the phototaking lens system, the camera comprises a drive means, for simultaneously zooming the phototaking lens system and the viewfinder lens system, which simultaneously shifts at least one of the lens groups of the phototaking lens system and at least one of the lens groups of the viewfinder lens system. The drive means simultaneously focuses the phototaking lens system and the viewfinder lens system on an object by simultaneously shifting at least one of the lens groups of the phototaking lens system and at least one of the lens groups of the viewfinder lens system based on the position data of the object.

Abstract: The focal length of an objective lens system is substantially equal at two wavelengths: one within the visible spectrum and one within an eyesafe IR spectrum centered about 1.54 .mu.m; the lens is essentially achromatic throughout the entire visible spectrum (0.45 .mu.m -0.70 .mu.m) and is well-corrected for other monochromatic aberrations (spherical aberration, coma, astigmatism, field curvature, and distortion). By having an objective lens that is common to both optical paths (visual and laser) and has the property of having essentially the same focal length and essentially the same angular deviation for the two optical paths upon lens decentration, then a practical mechanism can be included in the opto-mechanical design of a laser rangefinder to adjust the x and y decentration of the objective lens to accomplish a corresponding x and y adjustment of the system boresight.

Abstract: A finder optical system includes a photographing lens, an eyepiece having an optical axis substantially collinear with an optical axis of the photographing lens, and a relay optical system, including a relay lens system, disposed between the photographing lens and the eyepiece for optically connecting a primary focal plane of the photographing lens to a secondary focal plane disposed to be observed through the eyepiece. The relay lens system has an optical axis that is parallel with the optical axes of the photographing lens and the eyepiece, and the relay optical system includes a first pair of reflecting mirrors that relay the optical axis of the photographing lens to the optical axis of the relay lens system, and a second pair of reflecting mirrors that relay the optical axis of the relay lens system to the optical axis of the eyepiece.

Abstract: A viewfinder has an objective optical system and an eyepiece optical system. The viewfinder includes a supporting member which supports at least a part of either the objective optical system or the eyepiece optical system. The viewfinder further includes a hollow member provided separately from the supporting member. The hollow member is positioned in an optical path of the viewfinder such that a focal plane of the objective optical system is located in the hollow member. The viewfinder further includes a first transparent member secured to one end of the hollow member so as to face toward the objective optical system, and a second transparent member secured to another end of the hollow member so as to face toward the eyepiece optical system. An enclosed space in which the focal plane is located is formed by the first transparent member, the second transparent member and the hollow member.

Abstract: The present invention relates to a viewfinder of a camera for taking vertical/horizontal special effect type photos, which may use APS film for taking the known type photos as well as vertical/horizontal special effect type photos. A photo setting piece with vertical/horizontal photo sections is moved in or out of the viewfinder. The photo setting piece has a toothed rack engaging a linking gear connected to a drive gear and a control rod with a drive toothed rack. With this structure, the vertical/horizontal photo sections may enter the viewfinder subject to the need for taking wider or longer photos.

Abstract: An eyepiece for use in a viewfinder optical system has a wide dioptric power adjustment range. The eyepiece is provided with, from a side of a secondary-image plane formed by a first, a second, and a third relay lens, a first, a second, and a third eyepiece lens having a positive, a negative, and a positive refractive power, respectively. For dioptric power adjustment, the positive first eyepiece lens or the negative second eyepiece lens is moved in an optical axis direction.

Abstract: A image type viewfinder is provided with, in the following order from the object side: an objective lens group, a condenser lens group which transmits the image of the object formed by the objective lens group towards an eyepiece lens group, an image erecting optical system that erects an inverted image, and, the eyepiece lens group. The objective lens group consists of a first negative lens group and a second positive lens group, located in this order from the object side wherein first negative lens group and second positive lens group forming a movable variable focal length lens group. The first negative lens group comprises a double-aspheric lens which satisfies the following relationships:-0.5<.DELTA.X.sub.1-1 /f.sub.ow <0-0.10<.DELTA.X.sub.1-2 /f.sub.ow <0wherein .DELTA.X.sub.1-1 designates the aspheric value in the effective radius of a first surface of the double-aspheric lens; .DELTA.X.sub.

Abstract: A camera including a photographing lens and a finder to provide a viewing image field through which an object can be observed. The field ratio of the viewfinder field to the photographed image field on the film is 87% to 120% and the exposure value of the camera is 11 to 13.5.

Abstract: A viewing apparatus exhibiting high performance and an image forming apparatus including the same. The viewing apparatus includes a projection optical system for projecting an image on a viewer's eye, a detector for detecting the refractive power of the viewer's eye, and an adjustor for adjusting the projection optical system so that the image is formed substantially on a viewer's eye fundus. The imaging apparatus includes an imager for forming an image of an object, a projection optical system for projecting the object image on the viewer's eye, a detector for detecting the refractive power of the viewer's eye, and an adjustor for adjusting the projection optical system so that the object image is formed substantially on the viewer's eye fundus in accordance with the refractive power of the viewer's eye.

Abstract: The photographic camera has a watertight housing (11, 12) in which a film transport and guide mechanism, a taking lens (15), a viewfinder (16), as well as a flash unit are accommodated. The novel and inventive step consists in that an integral support member (14) is provided which is connected with housing (11, 12) in a watertight manner and into which the taking lens (15), the viewfinder lens (16) as well as the diffusion screen (17) of the flash unit are all integrated.

Abstract: A camera is applied to a compact camera or a VTR integrated with a simplified camera. A cam cylinder is used as lens driving mechanisms for a photographing optical system and a finder optical system. A moving lens frame and a connecting member provided with a cam dependent moving member are connected with an elastic member for forcing in a direction approaching each other, and then when an external force is added to the moving lens frame, the zoom lens system can be prevented from being damaged. A space near a focal surface is sealed up by a taking lens frame and a concave portion of a case, whereby the focal surface can be kept from collecting dust. Further, both end portions of a guide pole for guiding the taking lens frame so as to move back and forth in the case are press fitted into through holes formed at front and rear ends of the case and supported, whereby the guide pole can be assembled easily.

Abstract: A dustproof view finder in which an image formed by an objective optical system is made erect by an image erecting optical system and is observed through an ocular optical system as an erect image, the optical system including a pair of front and rear optical elements spaced from one another at a predetermined distance to define an aerial space therebetween, and a seal member which encloses the aerial space.