If you use the standard 1.5x multiplier suggested by everyone else then You'd be looking for either the FA 35f2 or the A 35f2
as these translate to the equivalent of 52mm.
I doubt this helps however.
You can get fCalc at http://www.tangentsoft.net/ as I've said it's a neat program.
Jon Glass wrote:
What with all the recent discussion on "best" lenses, etc. I've been wondering....
What would make a good "normal" lens for an *istD or *istDS? I'm not looking of "best" but what lenses made by Pentax would give a good image, comparable to something like 50/1.4 or 50/1.7? What wide angle lenses would make good "replacements" For reference, I'm not thinking AF, but rather something older, even screw-mount. To confess, the more I think of adapting an ancient screw-mount lens to digital, the more intriguing it sounds. :-) (partly the beauty of putting such an ancient lens on such modern technology, partly just the challenge of it, and only lastly "price.") :-)
In this case, I suppose, the more the merrier, not the _one_ "best." :-D
--
I can understand why mankind hasn't given up war. During a war you get to drive tanks through the sides of buildings and shoot foreigners - two things that are usually frowned on during peacetime.
--P.J. O'Rourke