The Tamron 54B arrived today (sans Pentax Adaptall) so I can take some shots with it once I put that on. I'm afraid I don't own the 55-300mm to do a comparison with that lens. I do plan on doing a comparison with my Bigma (and maybe the vintage preset 300mm f6.3 Takumar, which I also have).
It seems to me that the biggest benefit of the 54B is at the close focusing end, but it might be fun to do comparison moon shots with it. That's a torture test for a lens (and one's focusing abilities). On Thu, Jan 15, 2015 at 11:27 AM, Bipin Gupta <[email protected]> wrote: > Thanks Zos for the convincing reply. I mentioned the Pentax 55-300 as > the DxO Mark web site had the following to say:- > > DA 55-300 vs DA* 300 f4 > > How much real gain is there in upgrading to the star prime, over the > consumer zoom? > I would have assumed the improvement is large, but DxOMark says > otherwise. According to their numbers, the 55-300 is optimized to > favor the long end, so 300mm is actually the sharpest point in its > focal length range, and at that point, it produces the same sharpness > score as the 300/4! > In a way, though, I'm not that surprised, because of how flawless the > images I get from it at the long end. > And the newer HD 55-300 is still better in performance. It is the > sharpest at around f9.5 particularly at the corners. > > Maybe the newer HD WR version of the 55-300 is just as sharp as the > old Tammy. Computer aided design, newer glass and coating technology > may help. > If only a kind Pentaxian can do a test. > > Regards. Bipin. > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- Life is too short to put up with bad bokeh. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
