Abstract: A snorkel camera system has a light-admitting opening at one end of a housing and the prime lens of a camera connected to the other end of the housing, and the housing is rotatably mounted on the prime lens such that the housing can be rotated about the camera to any desired position, the optical system being such that the image seen in the view-finder of the camera is maintained in the correct attitude regardless of the position to which the snorkel housing is rotated.

Abstract: A snorkel camera system that has a prime lens connected to one end of the housing and a camera body connected to the other end of the housing, the optical axis of the prime lens and of the camera body being offset and parallel, and the housing is detachably mounted to the camera body such that the housing can be rotated about the camera body to a desired position and locked in place, the optical system being such that the image seen in the viewfinder maintains the correct attitude regardless of the position to which the prime lens is rotated.

Abstract: A stereo optics apparatus, comprising a zoom lens attachable to a camera body and having an operating element operable when moved in first and second directions to increase or decrease the focal length of said zoom lens, first and second spaced apart movable reflectors facing said zoom lens on either side of and transverse to the optical axis of said zoom lens, said first and second reflectors being movable to change the acute angle included therebetween, third and fourth reflectors facing said first and second reflectors, respectively, and said zoom lens, said reflectors being operable to divide the light entering said zoom lens into two separate beams, a first electrical motor for operating said operating element of said zoom lens, a second electrical motor for moving said first and second reflectors, said motors being operated in synchronism such that said included angle is increased or decreased by said second motor as said focal length is decreased or increased, respectively, by said first motor.

Abstract: A snorkel camera system using an 8 mm format camera lens as the prime lens and a 35 mm camera body employing 35 mm film.

Abstract: A snorkel camera system having an Amici roof prism in the snorkel tube to bend the optical path 90.degree. and to erect and reverse the image transmitted to the prism by the shooting lens, whereby the image of the object as viewed through the eyepiece of a camera body attached to the snorkel tube is erect and non-reversed.