The introduction of the micro four third system on Panasonic and Olympus brings demands for lenses that are a bit smaller than the existing 35mm SLR lenses. The image sensor size is exactly half the size of a full 35mm slr film. This means a 50mm lens on m43 will have the crop factor of a 100 compared to a 35mm full size. What you are gonna need is lenses ranging from 50mm and down, and they should rather be small yet light sensitive. The old Pentax 110 system is a perfect optical fit for the Micro four thirds, as the Pentax had a half-frame system. The lenses are thus optimized for that, being much smaller (almost too small). The adapter can be bought off Ebay, but they cost around EUR 45. This is more expensive than the 20mm Pentax lens itself. I decided to build an adapter myself. And here is the first test shots.
- Cheap m43 to c-mount adapter
- Original rear lens cap on the 18mm Pentax 110 Lens
- Micro c-mount ring (taken from Tamron CCTV Lens)
- 1-2mm thick rubber pad
I drilled and cut the rear lens cap so it could fin into the lens ring. I cut out some rubber to fit inside the lens cap. It prevents the lens from slipping off. The whole operation took me a couple of hours.