K Mount Primes
This 100mm f/2.8 macro is as small as they come, so how is it as a general purpose lens?
This classic 55mm f/1.4 lens is supposedly for APS-C, how does it do on full frame?
How does this classic Pentax wide angle lens hold up on the Sony A7?
So this lens has a legendary status, is it well deserved?
Another old wide angle that is about the same size as the OM, is it as good?
How does this cult classic wide-standard lens perform on modern APS-C Cameras?
Another old standard focal length macro (short telephoto on APS-C); pretty much every manufacturer had a standard focal length macro in the f/2.8-3.5 range.
I have already tested this lens on my Pentax K-5 and K-7, but how does it compare on the NEX 3? Tested for benchmark purposes. I copied the build text from that lens, but...
A compact telephoto with a large aperture is an extremely useful lens when combined with a nice compact body like the Pentax K-5, K-7, or even the old MX. How does the K 85mm...
Both 135mm and 200mm lenses were common on 135 format (35mm film) cameras, and conveniently 135mm times the 1.5 crop factor of Pentax is about equal to 200mm, making a lens with 135mm focal...