Thanks mikeSF and les3547.
---------- Post added 26-01-16 at 09:48 ----------
Originally posted by mortonbaychestnut bjolester,
Off-topic... I wonder if you may share your opinion re: K28 3.5 vs K30 2.8.
I several copies of each, and on the whole, the 28 seems sharper but has a magenta tinge whilst the 30 has nicer colours, saturation, contrast and dynamic range.
What do you think?
Thanks!
Before I found a copy of the SMC K30/2.8, the SMC K28/3.5 was my primary landscape lens for many years. The last year or so, I dared to start using the SMC K30/2.8 on a regular basis. I had some inhibitions using the lens at first, because of it being such a rare and rather expensive lens. But now it is more or less permanently fitted to my K-5.
I have not performed any "scientific" analytic comparison between the two lenses, but I have pixel peeped quite a lot, and I believe the SMC K30/2.8 is the sharper lens of the two, also in the borders of the frame. Have you seen Yoshihiko Takinami's Pentax lens tests? His findings support the notion that the SMC K30/2.8 is a very sharp lens:
http://www.takinami.com/yoshihiko/photo/lens_test/pentax_28-30.html
Apart from the sharpness/resolution aspect, I find both lenses to have wonderful colour rendition and an undefinable character, that I happen to prefer, compared to many contemporary lenses.