Godfrey,
For instance: the various comments on the Pentax-A 28/2.8 that
I've read tell me that it's not a particularly good performer.
In actual use, I find it a mite soft wide open, very sharp a
stop down, with beautiful oof rendering and fine detailing, zero
CA on the *istDS. I haven't tested it regarding its performance
on a 35mm film camera vs on the DS and it might truly suck on
film, but I'd recommend it to anyone as an inexpensive and
delightful lens to use on the *istDS.
I agree, I've found (using my Pentax Program A) that A28/2.8 may have a bit more distortion than M28/3.5 but otherwise it's a fine performer. It's not just sharpness alone that counts, IMHO! I don't know if it's a coincidence but I observed that if some lens isn't razor sharp wide open usually it does have beautiful bokeh. Hmm...
Bedo.
