Also after a recent firmware update the original K3 can use the new mount. “Crippled” K-mount All digital K-mount Pentax SLR bodies as well as some lower-end film cameras lack the ability to read the position of the aperture simulator. The link below to Matts Classic cameras page provides some more information. Each contact on the lens is either conducting or non-conducting, providing a binary 1 or 0, respectively. Six electrical contacts are added to the bayonet ring. Because I used a Pentax SLR for many years I had a couple of PK lenses and so it made sense to take this approach with a M4/3 to PK adapter. One permitted the lens to turn on the camera’s metering and focus sensors, two focused the lens (towards and away from infinity) and two appear to have been unused and may have been reserved for future functionality.
The frame does not interfere with the cameras photo viewfinder. Test any of the good tamrons against a typical kit lens and the comparison is normally favourable to the Tamron. With any camera, you want to bring it close to the body for stability.
Adhesive frames for mirrorless cameras and as an alternative to our metal system. We also offer extra anti-fog discs, Z-Bands to clip on to your camera body, glass diopters and more. All Z-Finder Pro models have a list price is $395.00 and like all Zacuto products includes a lifetime warranty. This information is used to make better exposure decisions, along with the multi-segmented metering that was introduced in cameras using the KAF-mount. Auto Aperture Button In the case of the Pentax PK-A and Canon CFD AD-2 mounts there is also a small black press button (green arrow in pics) on the rim of the mount that locks/unlocks the aperture ring into AE/f32 auto-aperture position.