Re: Comparison: Tamron 70-200 f/2.8 VC G2 & Canon EF 70-200 f/2.8L IS II
YuengLinger said:
Frank, you read English well enough, so your statement, "i wont be surprise if tamron win in the shaprness test because it was designed under new standard and the cannon are old standard," seems "designed" to either flame or mislead.
Yes, the images from the Tamron you've presented are impressively sharp; however, you show images supposedly from a Canon lens that are softly focused and have some weird CA going on. Most of us responding to you agree that these images are completely uncharacteristic of the ef 70-200mm f/2.8L IS II, which you can easily comprehend, yet you keeping banging on about it being an out of date lens?
Claims such as yours, with clumsy hiding behind language difficulties, raise questions about your motivations. I hope Canon Rumors knows who you are; if they haven't vetted you, I'm disappointed they gave you a soap box.
Speculation: the Canon lens could simply have a dirty UV filter on it, thus skewing results while identifying the lens in EXIF.
mislead ? nah , nowdays many company told you their lens are ready / design for supporting high resolution camera
actually at those years , lens wasn't designed for feeding monster camera which hunger for resolution , i did put my 70 200 IS II / 24 105 / 17 40 on my old 1D CCD / 1D MK II N and both at 100% i dont see any problem
on 5D MKIII or A7R it sell perform alright , the problem is when you enlarge from a big 50MP softcopy , some weakness will spotted .
while new generation lens they have some design requirement like "image weight" , like what sony saying on their GM series lens , you may ask am i using a problem lens . i can firmly told you that was my working lens and it kept in good condition , no issue or fogged element inside . the filter cap on was a B+W 010 UV wasnt the great but it wasnt the main issue of 100% view image are soft .
you may disappointed about the canon image test show " completely uncharacteristic" of a IS II but i am sure that i was similar to what canon test on their lens , you can try put some CANON L on the 5DSR and check it out , it does show the softness of the lens . if you still have problem asking me the resolution test was cheating , go read the official MTF chart , it wont lie to you
at 30Lp/mm which way lower than 5DSR requirement , then go check out tamron MTF chart
actually it was tired to explain for someone doesn't read stuff correctly
take a look on those lab test, if you want a good sharpness , put on some good lens
the OTUS is sharp even wide open , no need to argue about that right ?
lens did show weakness when put on a camera over it's maximum ability , just like those years people upgraded to D800E and found their 24 70 2.8 are damn soft , same problem happen when people upgrade to 5DSR
asking a 2010 introduced lens , wide open do razor sharp from border to border under 50MP 100% view ?
sorry i don't think there are lens like that exist
"completely uncharacteristic" wut ?
the high pixel density show the difference , if you resize the 50MP file to a smaller one , you may not able to spot the issue .
disclaimer : i dont recieve any penny from tamron or canon or any brand , and i dont have to running for advertisement yet , when i show the weakness of a canon , people judge me do cheating on the test lol
http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=687&Camera=979&Sample=0&FLI=0&API=0&LensComp=787&CameraComp=979&SampleComp=0&FLIComp=4&APIComp=0
another ISO 12233 chart test for the CANON 70 200 IS II
oh soft border ~ it must be cheating according to your "formula" ? (brand A winning brand B = cheating test)
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"If my Canon were that soft, I'd send it in for service. I'm not seeing this as a valid comparison, as mine is razor sharp at that distance without sharpening."
not sure yours are super copy or not but mine are similar to those test from DXO/TDP
not razer sharp on 5DSR , especially in border
will take another try next week , see if i could putting lens on different camera and see if the CANON could get "sharp" like what you say . my lens did perform like what it was on my 5D MK III and A7R
or can you show me some example ? wide open 100% view , razor sharp from border to border , 70 200 IS II with 5DSR , and i will take it to canon service center , ask them to calibrate my lens until it able to do that .
so i can made a "real" canon compare test image
every time doing testing , people always say your setup is wrong , the camera was not calibrated , the lens was not calibrated , the timing are not perfect , (tons of reason include your lens are bad copy , bad copy does exist ) (PS. i gonna say it again , it was not a lab test but i will try to made it more "reliable")
) of the Canon know that Frank's images are not representative, and in fact approach deception, perhaps to make the Tamron shine a bit brighter. Or he just has a copy with a hazy front element.
