Abstract: A mouse device includes a mouse casing, a circuit board, a first sensing module, a second sensing module and a switching module. The circuit board is disposed within the mouse casing. Both of the first sensing module and the second sensing module are disposed on the circuit board and partially exposed outside the mouse casing. The switching module is partially exposed outside a base of the mouse casing. The first sensing module or the second sensing module is exposed outside the base under control of the switching module. Consequently, a moving resolution of the mouse device is adjustable according to the practical requirements. The switching module has a simple mechanism for changing the moving resolution of the mouse device in a simple manner.

Abstract: The present invention relates to a camera and an interchangeable lens capable of further improving the operational performance while supporting an old-type interchangeable lens using a communication method in the related art. The camera to which the interchangeable lens is detachably attached and which is capable of switching between a first communication mode and a second communication mode as a communication method between the camera and the lens includes a first terminal and a second terminal used to communicate with the lens. In the first communication mode, the camera outputs a clock signal through the first terminal and receives information about the lens through the second terminal on the basis of the clock signal. In the second communication mode, the camera receives information about the lens through the first terminal and the second terminal without outputting a clock signal through the first terminal.

Abstract: An interchangeable lens camera includes a camera body and a lens unit. The camera body includes: a body-side mount section; a mounting determination section; a body-side communication section; and a body control section. The lens unit includes a lens-side mount section and a lens-side communication section. A specific body-side signal terminal among plural body-side signal terminals of the camera body is connected to a power supply through a pull-up resistor, and a specific lens-side signal terminal, which is capable of coming into contact with the specific body-side signal terminal, among plural lens-side signal terminals of the lens unit is grounded through a pull-down resistor. The mounting determination section determines that the lens unit is mounted on the body-side mount section when resistance values of both the specific body-side signal terminal at time of non-communication and a body-side detection terminal of the camera body are at low levels.

Abstract: A viewfinder for mounting on a camera having a video signal tap, such as a professional video camera, to extend forwardly and laterally of the camera. A pivotable member is connected to a support base for selectively pivoting about a laterally extending axis and being selectively locked in any angular position. A viewing module is releasably connected to the pivotable member to extend rearwardly along the side of the camera and has a CRT facing rearwardly with an eyepiece for viewing the CRT. The viewing module has controls for the CRT on an outwardly facing surface for manually adjusting the controls. Cooperating and releasable electrical connectors are provided between the pivot member and the viewing module for transmitting video signals and electrical power therebetween. An extension member, either of a fixed length or telescoping, may be installed between the pivot member and the viewing module and has the same electrical connectors.

Abstract: Disclosed is an improved lens system for low light applications. This improved low light lens system is designed for any suitable low light application, such as the above described biological imaging application. In one embodiment, a finite conjugate lens system is disclosed. The lens system includes, in order from a camera side to an object side, a first lens group and a second lens group. The first and second lens groups are adapted so that when light is passed from the object side to the image side, a substantially sized region of collimated light is formed between the first and second lens group. Preferably, the first and second lens groups are adapted to demagnify an object at the object side.

Abstract: Described herein is a lens changer for camera, which is provided with a unitary lens body integrally and contiguously formed with a main lens portion and at least one replacement lens portion of a different type in optical characteristics from the main lens portion, the lens body being movable across the optical axis of a camera to locate either the main lens portion or the replacement lens portion in a predetermined lens position forward of an image forming plane of the camera.

Abstract: An adjustable lens mounting device is provided in a photographic enlarger apparatus for adjusting the pitch and roll of the lens stage to achieve optimum alignment of a lens element therein. Pitch adjustment is provided by a pair of elements having complementary convex-concave longitudinal surfaces that are connected together for rotational movement. Roll adjustment is provided by a pair of elements connected together in planar face to face alignment for pivoting about a central point. The adjustable lens mounting device incorporates a lens holder which permits rotation of a screw-coupled lens element relative to the lens stage, so that it may be selectively rotatively positioned for convenient viewing. Also provided is a rotatable turret for selectively carrying a plurality of lens elements in and out of the optical axis.

Abstract: Motion picture camera apparatus uses a 35 mm prime lens assembly for a 16 mm motion picture camera. Between the prime lens assembly and the motion picture camera there is positioned a pair of fixed parallel mirrors mounted at an angle to the axis of the prime lens assembly. The light from the prime lens assembly may be reflected by a full mirror into a viewfinder, or through a partial mirror to both the viewfinder and the motion picture camera. A relay lens is positioned in the light path from the prime lens assembly to the motion picture camera.