Sure, interesting. My Industar 50-2 definitely has something special to it. Photos are very lifelike, practically no CA. But the resolution is fairly low - even on APSC the edges never become sharp. And its contrast is.. well, not as low as some other old manual lenses, but it is definitely not as high as the DA lenses that I have, and the colours are not as saturated.
The examples in that article, while interesting, kind of ignore light quality in each shot. I'd like to see this done in controlled conditions, then we can talk about "flat nose, 3D nose"
I would agree with the article that reviews might be pushing the lens development into the wrong direction - massive lenses, lots of glass, fast aperture, highly corrected. There are other directions that could be taken, but get practically no representation anymore, except with extremes like Lensbaby, Holga,.. But I think with Pentax K, we have a big variety, from regular primes, macro primes, to Limited and * primes, each following a different philosophy, with different priorities.
Originally posted by stevebrot 4-element Tessar-design (and similar) lenses for various formats
And aren't the Pentax DA limited pancake lenses based on the Tessar design? (so, all DA limited except 15mm and 35mm macro) This is what makes them pancakes, sharp, but not
super sharp and rather slow aperture.
So Pentax might not be far from that guy's "line of realism" at all. Is the HD DA 70mm known to have better 3D contrast than the FA 77mm ltd? The 77mm has an extra piece of glass and older coatings, faster aperture
Edit: One more thing, from the article: "Solution for modern lenses: improve glass and coating quality on old designs" -- this certainly echoes a lot of people on this forum. Someone should make that Triangle diagram thingy for Pentax primes