Originally posted by mk07138 As for your concern with the lenses, I have to disagree with you to a point. Obviously newer lens designs can take more advantage of what the strengths and weaknesses are for digital sensors, but I use several M series lenses and a couple of A series lenses and they take as good of pictures as my DA series lenses if I use them correctly.
Obviously you are right about having people buy a full frame body only to have legacy lenses to put on it. That would most certainly be an awful business approach, but I think we would find the image quality for much of that glass to be just fine. If those lenses take good pictures at 14.6 MP they'll most likely take good pictures at 15.0 MP and they'll probably look fine up near 20 MP. I think a lot of newer glass starts to show its flaws past 20 MP also.
I have an even stronger disagreement about the lenses; plenty of film-era lenses have been used on digital FF bodies with great results. Now if you're talking the cheap, mediocre lenses from that era, that's a different story, but the high quality lenses will produce good results. There's a ton of FUD out there about the alleged "need" for the "latest, greatest" lenses to take "full advantage" of FF (particularly high-res FF) sensors, but that's just more BS to push product. The real irony here is that
crop sensors place
higher demands on the lenses than FF sensors, because when you crop you force the lens to resolve the details that much smaller. Smaller format lenses always have placed higher demands on lens quality, and always will; larger formats will always place less demands on lens quality. This is an optical issue, and has nothing to do with film vs. digital, pixel counts or densities, etc. - it's a fact and it's not going to change. Thus, the notion that the legacy lenses we get great results with on the crop cameras are going to "disappoint" on a FF body is pure nonsense. As for the use of legacy lenses on digital bodies, what do you think people with legacy lenses are doing now?! We're not rushing out to buy new APS-C only lenses, I can tell you that!
Pentax wouldn't HAVE much of a customer base without those legacy lenses and backward compatibility, and if they don't get to FF before too much longer, they'll lose a good bit of business as those who want it buy other makes. Furthermore, as the technology continues to improve (i.e., as yields continue to increase, waste continues to decrease, and sensor costs continue to decline), FF prices will continue to come down, and as they do you'll be amazed at how many people who have declared their lack of interest will suddenly rethink their views.