And here's the full format variant of the test ...
[url="http://www.opticallimits.com/canon_eos_ff/579-tamron70200f28ff"]http://www.opticallimits.com/canon_eos_ff/579-tamron70200f28ff[/url]
Thanks for the effort Klaus...
The LaCAs in sample shots (@79mm f/6.3 & @70mm wide open) are quite visible... I mean they do exist where they supposed to... Do you think they're inline with the lab results?
Serkan
A CA width of ~0.5-1px is, of course, visible at 100% magnification - that's just normal. If you print such a 21mp image the problem should not be disturbing.
This is most pronounced at harsh contrasts - the CAs are much less visible if the brightness difference is less extreme.
Looks like USD is really needed here.
Interesting review, which also reminds me that the physical side as well as the optical needs to be also considered when looking at lenses. For example, the "reversed" zoom direction (compared to Canon) and described AF/MF handling to me would probably be deal breakers if I were in the market for such a lens.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.
I was very serious. It's not a matter of can or can't, but a matter of speed. I did transition from Sony/Tamron in the past, and now I'm Canon/Olympus. I don't mind which direction it goes, as long as it remains the same within a set. My main interest is wildlife, and you don't get many 2nd chances where opportunity is very short lived. As simple a mistake as turning the zoom ring the wrong direction has lost me shots when transitioning between the systems.
Looking at Sigma, they bother to change the zoom direction depending on the mount, at least for some of their premium lenses but not all of them.
It might not be important to everyone, but that doesn't mean it isn't important at all.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.
' /> You can get accustomed to driving on the wrong side, then you can surely teach your hand to turn in an opposite direction as well. <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='
' /> Please give us some serious arguments, if you have them! Kindly Vieux Loup