Originally posted by reh321 However, note the title of this thread - the OP's initial complaint seems to be primarily about the [COLOR=Lime]green button[COLOR=Black]. I'm getting so tired of those complaints that I'm seriously thinking of replacing my current avatar with a picture of the corner of my K-30 where the [COLOR=Lime]green button[COLOR=Black] rests, mostly not used. NOTE: mission accomplished -see my new avatar
the green button haters are gonna have to put you on ignore to get away from it
Originally posted by reh321 When you mount one of those lenses on a modern Pentax camera, the lens automatically opens to its widest aperture for composing and focusing; you have to press the [COLOR=Lime]green button[COLOR=Black] to get it to meter at the set aperture {incidentally, I believe that the "modern" LiveView you espouse would labor under the same "handicap"}.
that's actually true to some extent, but for different reasons... when there are 399 pdaf sensors covering most of the sensor, af works best at wide open aperture, especially on a fast lens... sony changed the a7rii to open the aperture all the way up to af with some lenses, then stop down to take the shot.
unfortunately it caused problems, and afaik it can't be defeated, with those few lenses that use it... you don't need to do it with legacy glass, because with wysiwg the evf automatically brightens up to compensate.
the o.p. is right to not like it with his old glass, because of focus shifting... all three of my 50/1.4 taks have serious focus shift off of f/1.4, it's easy to see in the evf, and i have a couple of slow lenses that actually have focus shift further up the aperture range, not off of wide open aperture.