next PZ lens test report: Carl-Zeiss Vario-Tessar T* 24-70mm f/4 OSS ZA - Printable Version +- Opticallimits (https://forum.opticallimits.com) +-- Forum: Forums (https://forum.opticallimits.com/forumdisplay.php?fid=4) +--- Forum: Sony (https://forum.opticallimits.com/forumdisplay.php?fid=14) +--- Thread: next PZ lens test report: Carl-Zeiss Vario-Tessar T* 24-70mm f/4 OSS ZA (/showthread.php?tid=1534) |
next PZ lens test report: Carl-Zeiss Vario-Tessar T* 24-70mm f/4 OSS ZA - Brightcolours - 03-29-2014 Quote:I get that if you are interested in LENS performance you can compare numbers within a system, or to some degree charts.Photozone reviewers use sharpening in their MTF workflow. Sharpening is not linear (to a point unsharp results will benefit more that sharp results) soyou can not really compare cross platform like that. Another thing the sharpening prohibits is judging the real impact from diffraction. next PZ lens test report: Carl-Zeiss Vario-Tessar T* 24-70mm f/4 OSS ZA - H. J. Simpson - 03-29-2014 Pricing around the world is weird. Canon 24-70 F4 is selling for $900 on ebay, while this Sony/Zeiss lens is at least $1000, so the Canon is actually cheaper than this one. At least for those of us that don't have to pay customs fees. next PZ lens test report: Carl-Zeiss Vario-Tessar T* 24-70mm f/4 OSS ZA - Klaus - 03-29-2014 Quote:Photozone reviewers use sharpening in their MTF workflow. Sharpening is not linear (to a point unsharp results will benefit more that sharp results) soyou can not really compare cross platform like that. Another thing the sharpening prohibits is judging the real impact from diffraction. Actually we select the parameters according to the metric that the best results are neither under- nor oversharpened (which is provided by Imatest in %). Please note that an AA filter is essentially a negative sharpening filter that have an impact on diffraction just as sharpening. Essentially we are just equalizing the forces by introducing a similar amount of counter sharpening. The same metric is actually used across all systems. The idea is also to provide real world results. No user on mother earth is using RAW data as is. next PZ lens test report: Carl-Zeiss Vario-Tessar T* 24-70mm f/4 OSS ZA - ficofico - 03-29-2014 Quote:soyou can not really compare cross platform like thatyes, but you can compare slrgear VFAtarget and watch your self that zeiss 24-70 at 24 f8 have really more resolution at lest 90% of the frame than zuiko 12-40 at 12 f8 if you resize both images at 3000 px zeiss https://dl.dropboxusercontent.com/u/8602032/test/zeiss%2024%20f8.jpg zuiko https://dl.dropboxusercontent.com/u/8602032/test/zuiko%20f8.jpg download, open in photoshop, bucubic resize heigh=3000, save quality=11 It's obvious that zeiss 24-70 f4 it's not able to match the 36 megapixel sensor, but it's quite obvious that, resolution wise, combo a7r + 24-70 f4 it's better that 16 megapixel sensor + zuiko 12-40 f2,8.... see your self or try to replicate download the file next PZ lens test report: Carl-Zeiss Vario-Tessar T* 24-70mm f/4 OSS ZA - ficofico - 03-29-2014 zeiss 70 f4 https://dl.dropboxusercontent.com/u/8602032/test/zeiss%2070%20f4.jpg zuiko 40 f2,8 https://dl.dropboxusercontent.com/u/8602032/test/zuiko%2040%20f2%2C8.jpg What do you think it's better? Only in the very extreme corner zuiko lens have a bit more resolution but, again, in 90% of the frame 24-70 lens it's better resolution wise.. next PZ lens test report: Carl-Zeiss Vario-Tessar T* 24-70mm f/4 OSS ZA - youpii - 03-30-2014 Thanks for the review. Could you please add a photo of the rear of the lens ? I think Sony should stick to small prime lenses for the A7, like Leica did with the M mount. Although the Tri Elmar 16-18-21mm f/4 is a fine lens too. In my case, I have the A7r with adapted Contax G lenses. The combo with the G35 G45 & G90 works fine for me (but it's crap with G21 & G28). next PZ lens test report: Carl-Zeiss Vario-Tessar T* 24-70mm f/4 OSS ZA - Guest - 03-30-2014 Gianluca This was my point; and comparing the raw numbers gives a (very fallible) guide to the kind of thing you were saying. So in my case I wanted to know if the total system resolution of the Panny 12-35 on OMD I used to use when hiking was better than the FE on A7r; and it looks like the total system resolution of the FE/A7r is in fact between just better and much better at different points. Of course it's disappointing that it's not much better everywhere given that we are talking a 36MP sensor; but it means that I can be confident that I've not lost anything while hiking by using this system, and gained a lot when using the primes. The Oly 12-40 is better in the corners than the Panny; so the total system resolution for Oy+16MP is likely as you say very slightly better for that combo in extreme corners at the extreme focal lengths, but much worse elsewhere (though if a higher MP M43 sensor came out this might change!) next PZ lens test report: Carl-Zeiss Vario-Tessar T* 24-70mm f/4 OSS ZA - peterottaway - 03-30-2014 Unless there is a change in technology. once you get above 24 MP with m43 sensors then I suspect that things may fall apart on you. Sure you have 20 MP 1 inch sensors but I don't usually go above an EI of 400 unless desperate. Do you want to be limited to EI 400 - 500 ? Probably better to tweek the sensor,processor,AF and exposure performance than go for broke. Perhaps not as sexy but the boys in PR should still be able to sell a 20% improvement in AF speed and accuracy. If not then they should be back to copy and pasting the second hand car ads. next PZ lens test report: Carl-Zeiss Vario-Tessar T* 24-70mm f/4 OSS ZA - Guest - 03-30-2014 Quote:Unless there is a change in technology. once you get above 24 MP with m43 sensors then I suspect that things may fall apart on you. Sure you have 20 MP 1 inch sensors but I don't usually go above an EI of 400 unless desperate. Do you want to be limited to EI 400 - 500 ?Hey, I wasn't advocating higher MP M43 sensors; just saying that if they happened then the low ISO resolution of the Only12-40/sensor combination might be greater than the current system resolution of FE2470/36MP. Whether that would be worth any tradeoffs is another matter. Having said that, it seems these days that overall sensor size (rather than no of megapixels) that determines high ISO limitations, so it might not make much difference. That is, it's not the pixel density of the I inch sensor which limits it, but it's size (unless of course you are looking at non-normalised 1:1) next PZ lens test report: Carl-Zeiss Vario-Tessar T* 24-70mm f/4 OSS ZA - Rover - 03-30-2014 Finally, a review... and a sad one at that. Klaus, do you think this one is going to be better on, say, A7? P.S. SLRGear has reviewed this lens around the same time. Their results and conclusion were, of course, fairly similar. P.P.S. Are you going to test the 28-70 sometime? I wonder what that one is like... some people say it's at least as "good" (or as bad, depending on the viewpoint). |