introduction | cameras | belt clip | body cap | boxes | cases | display stand | flash unit | filters & close up | lenses | dioptre correction | microscope adapter | motor drives | tele-converters | tripod adapter | view-finder cover
Interestingly, Pentax Auto110 lenses do not have diaphragms. The cameras had a special combined shutter and aperture mechanism which sets both, behind the lens. As long as you can fabricate a mount out of a damaged lens, the cameras should function fine with virtually any f2.8 lenses adapted to them. By varying the maximum f/stop from the f2.8 the camera is designed for, you would also have a form of exposure compensation. Each of the standard lens included a hood.
The photographs above show the 18mm (early version front, later version in the bubble dome), 24mm, 50mm (early version front, later version in the bubble dome), 18mm pan focus, 70mm lens (two different caps) and zoom (also with two different caps). Note the sponge (now decaying) holds the end cap for the lens.
Lenses available included the six element 18/2.8 wide angle, the low cost and now collectible fixed focus 18 mm "pan focus," the six element 24/2.8 normal, the five element 50/2.8 portrait lens, the hard to find six element five group 70/2.8 long telephoto, and the very hard to find eight element in eight group 20-40/2.8 zoom and even rarer metal shade. Collectors fill out their shelves with the very useful Soligor 1.7x Tele-converter. Doubling the focal length of the Pentax 110 lens tells you its equivalent in 35mm, so the System 10 lens range covers the equivalent of 35mm wide to 140 telephoto in 35mm terms. Strangely enough, Pentax never marketed a tele-converter for System 10.
The 20-40 zoom, 70/2.8, and Pan focus 18 were introduced late in production at the 1980 Photokina. This helps explain their relative rarity. Judging from the shape of the reflections of the glass, the 20-40 apparently uses an aspherical element. Surprisingly, it's not unusual for Pentax to use Aspherical designs and NOT publicize it.
Last Updated on 16th May 2005