Originally posted by dadipentak Optically, many of the screwmount lenses are very good and they're pretty inexpensive. The genuine Pentax adapter works just fine but installing and removing it is kind of a pita--a semi-delicate operation with the camera open to the elements.
I can't understand how people have trouble installing and removing the adapter. Pinch it between your thumb and the nail of your forefinger, give it a 1/4 turn and whip it right out. To put it on, stick your forefinger and middle finger inside to just above the first joint, bend your fingertips out of the way, line up the dot, and twist it right on. Takes mere seconds to do either one.
Quote: I think using K-mount and screwmount lenses on the same body is difficult. If I were interested in these lenses I'd probably dedicate a body to it with the adapter more or less permanently installed.
You've hit the nail on the head right there.
The problem that most people have, I think, is that they get just one or two that don't really cover the range of their shooting needs and consequently end up having to swap back and forth between M42 and K-mount. That would be a royal pain in the butt. If a person had a full range of M42 except for one lens that was in K-mount, it would be just as annoying to swap that K-mount as it is for the other more normal situation of having a range of K-mounts and having to swap one M42 in and out of the mix. So the problem is not some inherent fault of the M42....it is a problem of mix-n-match and the associated aggravation.
My solution was to get a range of Takumars that fill my needs, and I just swap from M42 to M42, which is no particular hassle.
Most people think the adapter is something they add to the camera so they can use M42 lenses. I think the adapter is something I
remove from the camera so I can use K-mounts (not a common occurrence).