Originally posted by LesDMess I take it the aperture markings are not visible in the viewfinder . . .
Typical KEH underrated find. Looks like it has a couple of good reviews/samples. I was surprised it's available in an M42 mount.
Great find and hope you get some good use out of it!
No apertures or any other info in the finder.
The mount is detachable and there is, if you could ever find it, an m42 mount too. Full manual diaphragm which is OK with digital since you can use AV instead of M/green button with stopped down metering. Even if I can’t use the behemoth very often, it makes a very nice addition to my 1957-77 Pentax collection.