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[url="http://www.opticallimits.com/canon_eos_ff/570-canon70300f456islff?start=2"]http://www.opticallimits.com/canon_eos_ff/570-canon70300f456islff?start=2[/url]
I think there're a couple of darn sharp ones in there.
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[quote name='Klaus' timestamp='1292773538' post='5110']
[url="http://www.opticallimits.com/canon_eos_ff/570-canon70300f456islff?start=2"]http://www.opticallimits.com/canon_eos_ff/570-canon70300f456islff?start=2[/url]
I think there're a couple of darn sharp ones in there.
[/quote]
Nice and sharp indeed. There is visible CA in the 300mm shot (I think magenta/green, might be red/blue-green), but low, as your data showed. At the short end (70 & 93mm shot) the CA seems stronger than your measurements (but that usually is the case with your measurements and what I see), seems to be red/blue-green and easily correctable by changing the red channel size (which would enhance sharpness at the edges even more).
All in all the lens looks to be a very good one... which I do not like, as its compact size, very fast AF, contrast and IS make it very interesting.. but it is so expensive! It might just find its way into my bag in a year or so... or will the Tamron match its contrast?
genotypewriter
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[quote name='Brightcolours' timestamp='1292774815' post='5111']
All in all the lens looks to be a very good one... which I do not like, as its compact size, very fast AF, contrast and IS make it very interesting.. but it is so expensive! It might just find its way into my bag in a year or so... or will the Tamron match its contrast?
[/quote]
It's a really good lens for what it is. But I was using it for street-like and tracking shots the other day... I was getting frustrated by the variable aperture because I shoot a lot in manual exposure. For me that's what it all came down to (and the fact that I don't buy zooms anymore lol)
GTW
