For a while I had the Pentax A 35-105/3.5 lens:
(From left to right: K 35/3.5, A 35-105/3.5, M 135/3.5)
Pentax DSLR's program modes work with it (because of the A position of the aperture ring), but of course without autofocus. The image quality was quite good, but the lens is uncomfortable to use on the *ist Ds or the K10D. There's some sort of disbalance of weight with the lens. It is hard to handle a camera when rotating two rings of the lens one after the other.
After switching from DSLRs to mirrorless cameras, this lens was completely out of use. But somehow I tested it on a Samsung NX camera and again I was convinced that the image quality was really good for a zoom lens of the time.
This lens hadn't waited for a full-frame camera, I sold it very cheaply a few years ago because of some fungus. I would like to see how it performs on the full-frame camera, but I doubt it will be usable on the relatively small Sony a7c. Again because of that unbalanced weight.
Anyway, the Pentax A 35-105/3.5 is a surprisingly good image lens.
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