Abstract: The invention relates to an optical assembly for a camera comprising a color-separation system 1 having three exit windows 3, 4 and 5. A solid-state image sensor 6, 7 and 8 is fixed in a desired position to each exit window 3, 4 and 5 by means of a holder 9, 10 and 11. Each holder 9, 10 and 11 comprises a first holder plate 12, 13, 14 having an aperture 45, 46, 47 and a second holder plate 15, 16, 17 having an aperture 48, 49, 50 and an elastically deformable element 18, 19, 20 which surrounds the apertures of a holder.

Abstract: In a cassette for a camera, two filter wheels are provided. Each filter wheel is held between two guide wheels and a drive wheel. The drive wheel is driven by a miniature electric motor. For each filter wheel, one associated guide wheel is connected to a lever. By lifting the lever, the filter wheels are released and can be taken out of the cassette. A code field is provided along the circumference of each filter wheel. Each code field is read by reading means. In this way, each filter element on each filter wheel can be moved into the optical path of the camera. The electric connections terminate in a plug which during insertion of the cassette mates with a socket in a rear wall of the camera. The cassette may also be provided with a test-slide projector for focusing the pickup tubes in a camera.