Originally posted by Cuthbert Thank you guys, I'll try to find out a K-1 to try, pretty curious to see how it works.
Still not convinced about the K50 because of format problems, I would like a full frame to get what I would see on film.
Yes, best to try in person, if at all possible. Even better would be to spend some time with a K-1 owner for a photowalk.
As for how the metering works, even I got a little confused reading some of the comments on this thread. The rules are simple:
- All but M, X, and B modes require that the body be able to control the aperture setting
- If the lens has no contacts on the mount, the body cannot control the aperture setting
- With one exception (see below), open-aperture metering is not supported for any lens lacking contacts on the mount
Moving on, here are the rules (a little more complex) for when the body cannot control the aperture:
- All modes except M, X, and B default to Av mode
- Metering is limited to center-weighted averaging
- In Av mode the camera will adjust shutter speed to match the light coming from the lens (metering is technically stop-down)
- Because of the above point, Av mode works great for adapted lenses and K-mount lenses with fully manual or preset aperture mechanisms
- In Av mode, the body will NOT engage the aperture actuator lever on auto-aperture lenses unless the A contacts are detected. As a result, K and M series lenses will always shoot wide open in other than M, X, and B modes. This is the single exception for open-aperture metering with K and M series lenses, though metering is technically stop-down even in this case.
- In M mode, the body will always actuate the aperture on all K-mount lenses
- Stop-down metering in M mode is available via the green button and/or optical DOF preview feature. In practice, this works very well and is not particularly cumbersome.
One final note. Stop-down metering is not completely equivalent to open-aperture metering. The reasons are complex, but it is enough to say that "chimping" exposure is highly recommended.
Steve