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next PZ Lens Test Report: Sigma AF 17-50mm f/2.8 EX DC HSM OS - Printable Version +- Opticallimits (https://forum.opticallimits.com) +-- Forum: Forums (https://forum.opticallimits.com/forumdisplay.php?fid=4) +--- Forum: Canon EOS (https://forum.opticallimits.com/forumdisplay.php?fid=11) +--- Thread: next PZ Lens Test Report: Sigma AF 17-50mm f/2.8 EX DC HSM OS (/showthread.php?tid=3822) |
next PZ Lens Test Report: Sigma AF 17-50mm f/2.8 EX DC HSM OS - Klaus - 07-01-2010 [url="http://www.opticallimits.com/canon-eos/531-sigma1750f28os"]http://www.opticallimits.com/canon-eos/531-sigma1750f28os[/url] Quite impressive actually. FWIW, this lens was purchased just for these tests and is now available for sale (540EUR + shipping). next PZ Lens Test Report: Sigma AF 17-50mm f/2.8 EX DC HSM OS - Guest - 07-01-2010 [quote name='Klaus' date='01 July 2010 - 09:32 PM' timestamp='1278016326' post='791'] [url="http://www.opticallimits.com/canon-eos/531-sigma1750f28os"]http://www.opticallimits.com/canon-eos/531-sigma1750f28os[/url] Quite impressive actually. FWIW, this lens was purchased just for these tests and is now available for sale (540EUR + shipping). [/quote] In the conclusion you state it is best in class; does this mean you think it out performs the canon 17-55? (It is less expensive but lack IS and FTM; not sure if it is better built). next PZ Lens Test Report: Sigma AF 17-50mm f/2.8 EX DC HSM OS - Klaus - 07-01-2010 [quote name='you2' date='01 July 2010 - 10:40 PM' timestamp='1278016813' post='792'] In the conclusion you state it is best in class; does this mean you think it out performs the canon 17-55? (It is less expensive but lack IS and FTM; not sure if it is better built). [/quote] Where do I state that ? " starting at f/4 it beats or at least matches alternative products including the more expensive Canon EF-S 17-55m f/2.8 USM IS" So obviously it does not beat it at f/2.8. And the Sigma has an IS (OS) of course. The build quality is "different" compared to the Canon - more "tight" but less sophisticated. next PZ Lens Test Report: Sigma AF 17-50mm f/2.8 EX DC HSM OS - Guest - 07-01-2010 My fault -- read "Sigma's best product in this class so far." as "best product in this class so far ". Please forgive me. I should take a nap. [quote name='Klaus' date='01 July 2010 - 09:51 PM' timestamp='1278017513' post='793'] Where do I state that ? " starting at f/4 it beats or at least matches alternative products including the more expensive Canon EF-S 17-55m f/2.8 USM IS" So obviously it does not beat it at f/2.8. And the Sigma has an IS (OS) of course. The build quality is "different" compared to the Canon - more "tight" but less sophisticated. [/quote] next PZ Lens Test Report: Sigma AF 17-50mm f/2.8 EX DC HSM OS - miro - 07-02-2010 Thanks for the nice review. I’m happy that I this review is included some AF properties like – rotating angle, MF focus capability etc. Klaus what is your experience with this lens. How it compares to the old Tamron 17-50/2,8. next PZ Lens Test Report: Sigma AF 17-50mm f/2.8 EX DC HSM OS - Klaus - 07-02-2010 [quote name='miro' date='02 July 2010 - 09:23 AM' timestamp='1278055383' post='797'] Thanks for the nice review. I’m happy that I this review is included some AF properties like – rotating angle, MF focus capability etc. Klaus what is your experience with this lens. How it compares to the old Tamron 17-50/2,8. [/quote] The old Tamron had some hefty field curvature issues so despite the better chart figures at 17mm @ f/2.8 there's no real world advantage for the Tammy at this setting. I think the Sigma is better at 17mm f/4 and the Tammy requires f/5.6 to catch up again. The Tammy has more CAs so its subjective quality perception may be somewhat lower as well here (unless you correct the issue). The Tammy has a tad less barrel distortion at 17mm. Personally I'm not a fan of the Tamron build quality nor style - Sigma is better here. However, the Tammy non-VC is a lot cheaper. So they're darn close - just like their ratings indicate. :-) next PZ Lens Test Report: Sigma AF 17-50mm f/2.8 EX DC HSM OS - Guest - 07-02-2010 Surely a very nice lens, soft corner at f2.8 isn't really field relevant, I mean who shoot 2.8 to in order to get everything sharp? next PZ Lens Test Report: Sigma AF 17-50mm f/2.8 EX DC HSM OS - Guest - 07-02-2010 Where are border and extreme exactly in the frame? next PZ Lens Test Report: Sigma AF 17-50mm f/2.8 EX DC HSM OS - mst - 07-02-2010 [quote name='Rasho' date='02 July 2010 - 11:44 AM' timestamp='1278067487' post='802'] Where are border and extreme exactly in the frame? [/quote] There's an illustration in our Lens Test FAQ: http://www.opticallimits.com/Reviews/lens-test-faq -- Markus next PZ Lens Test Report: Sigma AF 17-50mm f/2.8 EX DC HSM OS - Guest - 07-02-2010 Aha, I figured that extreme borders are mostly irrelevant, zhat can-t be said for borders |