Originally posted by smc Correct me if I'm wrong, but people are worries that the K7 is sharper than the k5 (from the recent posts). Now we hear that you can't get a sharp image from an older lens. Perhaps this is good...then we won't see people bastardizing Pentax lenses to cram on their Canons and Nikons.
Joking aside, if you put a crappy older lens on your camera, then perhaps, but isn't that the same as buying a cheap new lens? Some older lenses are expensive and there is a good reason for it. Since they were designed for better quality FF film, do you really think those lenses can't produce sharp shots? Are you saying that a lower resolution camera can produce sharper shots with these lenses than a high resolution camera? Isn't that the fault of the camera and not the lens? Are you saying that things are so razor sharp with the K5 that previous photographic expectations are obsolete?
Let's put to rest the "K-5 is soft" urban legend, shall we ? 'Cause it isn't true.
OK, on the subject of lenses which may not be so good on the K-5.
There's no way anyone can make blanket statements about old lenses, because Pentax made many Excellent lenses even from manual focus days, which would be perfectly OK on the K-5.
However, there were also some pretty pedestrian lenses along the way, and there are also lenses which may have been very good when new, but haven't been well taken care of over the years....
How I qualify a lens as "ripe for retirement" on the K-5 is to compare the same scene taken with the best Pentax glass I have - DA*50-135, FA 43 Ltd, DA 70. On the K100D, for example, the differences are less obvious.
My older version DA 18-55 (from the K100D) would be considered a very good kit lens on the K100D, still OK on the K-7, but on the K-5 it just falls so far short of what the sensor is capable of , I don't think I'll use it....
I have an old A 50mm f/1.4 I bought "cheap" on E-bay, which isn't in pristine condition any more. It was OK on the K100D, even K-7, again, just doesn't quite make it on the K-5. I think the lens has a very good reputation, just not the copy I have. I'll retire this one.
(note : not the FA 50mm f/1.4, which I bought new a few years ago, and its still just as good on the K-5)