The SF7 (SF10 in some territories) is an autofocus 35mm film SLR made by Pentax, from 1988. It is intended for use with Pentax 'F' series (KAF lenses. It offers several exposure modes:

• Programmed AE

• Shutter-priority AE

• Aperture-priority AE

• Metered manual exposure

Programmed or shutter-priority AE require camera control of the lens aperture, and so are only available if an F-series lens is mounted. Earlier series lenses can be used for other modes, but will not support all the functions:

• A-series (KA) lenses support most functions, including shutter-priority and programmed AE.

• M-series (simple K mount) lenses do not support shutter-priority or programmed AE.

• 42 mm screw-mount lenses (with a screw-to-K-mount adapter) can be used; the camera switches to stop-down metering. No AE modes can be used.

Auto-focus can be used with any of the K mounts if they are mounted with the AF Adpater 1.7X, provided the lens has a maximum aperture of f/2.8 or wider. In manual focus, the focus indicators in the viewfinder work for any of these lenses with maximum aperture of f/5.6 or wider. Neither auto-focus or the focus indicators work with screw-mount lenses.

Settings are displayed in an LCD panel on the rear of the prism, and selected using a mode button (to the left of the prism) and a selector switch(knurled wheel-like switch next to the shutter release) to adjust the settings within each mode. The mode is selected by pressing the switch to the left or right, while pressing the mode button. Settings within each mode are then adjusted using the selector switch.

SOURCE: Camera-wiki.org