Originally posted by fiddlefye I guess I was thinking initially of the functionality aspect, what the experience of using K and M lenses on the K-1 is actually like.
The short answer is that you are limited to M, X, and B modes if you plan on shooting other than wide open.
1 In M mode, stop-down metering is limited to center-weighted and spot.
2 Shake reduction and most other camera functions remain intact.
The strategy is pure vintage. Meter the subject and use the same settings until either the light or the subject changes.
Steve
1 This restriction is common to all Pentax dSLRs. P, Sv, Tv, Av, and TAv modes all silently default over to Av mode, though with no ability to stop the lens down. All exposures are done wide-open.
2 Meter reliability/accuracy with the optical viewfinder may be compromised with readings either over or under expected. How much and direction of error depends on lens and set aperture. It should also be noted that the range of meter sensitivity applies to stop-down metering in that too little light (< LV
100 -3) to the meter will result in gross under-exposure. Live view metering is generally reliable.