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I made some research regarding this lens last night. they called it by various names like Samyang, Rokinon, Polar, Vivitar, Bower, etc...
it generated some interests in me since I was looking for a much shorter telephoto than my FA100/2.8 which is a great telephoto lens for portraiture especially if used wide open and I love it's rendering very much but found it a bit too long and quite slow for lowlights. due to the absence or rarity and cost of the Pentax 85's, I looked for other alternatives. such alternatives includes the DA70 and FA77 where both are outstanding lenses but are quite pricey for me. I do find the price of the 3rd-party 85mm very attractive. you got get 2 copies for the price of the DA70 and 3 copies for the FA77. not to mention that it is a 1/2 faster and 1 1/2 faster than both lenses at f1.4. what I seem to like about the 85mm lens is it's usability at 1.4 and rendering which is as creamy and nice as that of the FA100 in some way but I give the 85 more edge on the OOF field and lowlight performance. I found the images truly amazing basing from what I initially saw eventhough I haven't really tested it yet personally. I just can't seem to understand why there are people who seem to put this lens down while I see it to be really nice. a lot of inconclusive and somehow biased remarks are given to it and preference over the other 85s' such as the 1.8's and 1.4's of the big two. while a few people acknowledge it's advantages over those in terms of sharpness and rendering. I'm very much familiar with the Nikon and Canon 85s 1.8 sharpness and liked them. but I would disagree with some of the fanboys comments that those two are sharper than the 3rd-party 85. I do give credit to where it's due and I don't see any point of not liking that lens just because it ain't a prime brand. though the results speaks otherwise.
the only cons that I see about the 3rd-party 85 are it's lack of AF function or focus-confirm chip which could had been very helpful for a catch-in-focus shooting which could had been cool considering shooting at a fast rate. but anyway, this does validate my purchase of a Katz-Eye for the K-7. I could only imagine or salivate on how this lens would perform on that camera. or does anyone here would be willing to post some pictures taken from it?
as for me,I'm considering a future purchase of this lens and I'm looking on getting the Rokinon version.
P.S. I believe this lens' results are better cropped on the K-7 rather than putting on a TC.
Last edited by Pentaxor; 10-09-2009 at 03:06 PM.