Pentax M 200/4: on the full-frame sensor

I have the Pentax M 100/4 (a manual focus lens pictured on the right):

It's relatively small.

I tried it on my Samsung NX500 (1.5 crop, 28Mp). When focused accurately, the Pentax M 100/4 was better than the Samsung NX 50-200/4-5.6 III.

Although I don't like long focal lengths,  I also tried the M 100/4 on a Sony a7c (FF, 24Mp). And it turned out pretty good for its age.

A birdie:

Cropped 1:1.

Out of focus:

The main problem, of course, is the manual focusing, which must be accurate to get a good result.

See also related notes:

• My Pentax lenses (+Takumar) (2023-02-09)
• Pentax M 200/4 (2016-06-08)
• Samsung NX 50-200/4-5.6 III ED OIS: впечатления (2014-01-31)

Image albums:

• Pentax