Some time ago, I had a Pentax *istD. I used only MF "A" Primes on it with one exception. That was a Pentax "A" 35-70 f4 Zoom lens. I was very happy with the image quality from that lens and while it is an inexpensive lens, I would recommend it w/o qualification. Loved what I got from it. As for AF Lenses, I never used one.