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p.5 #5 · p.5 #5 · Official: Canon EF 85/1.4L IS, TS-E 50/2.8, 90/2.8L & 135/4L Macro | |
rscheffler wrote:
I think if you look really closely at this image there is some indication of 'bokeh fringing' such as along the edge of her back there is a faint green outline. Or the wires of the bridge, again a hint of green along the edges away from the point of focus and possibly a bit of magenta in front.
http://cweb.canon.jp/ef/info/ef85-f14-usm/img/index/img-f14.jpg
It's from this Canon page: http://cweb.canon.jp/ef/info/ef85-f14-usm/index.html
freaklikeme wrote:
Yeah, you can see the magenta between her index finger and hand. Disappointing given the performance of the 35LII, but, in comparison to other manufacturers' lenses at this focal length and speed, you have to spend a lot more and give up AF to get much improvement, if that photo's any indication. Spherochromatism doesn't often get addressed at this focal length, unless it's via software. The big question is- how far do you have to stop it down to make it go away?
Does it matter? Of the modern AF 85/1.4 lenses, this 85/1.4L IS likely has the least longitudinal CA. It's certainly visible in the 85/1.4 | Art and 85/1.4 GM, but not really noticeable. It seems Canon really split the difference between these two established lenses in many ways.
It seems that leaving that last bit uncorrected has been a trend, and I'd posit it is likely due to placing background rendering and smooth focus transition above apochromatic-level color correction.
-And to address the question: I'd expect the longitudinal CA/spherochromatism to go away rather quickly. This lens' predecessors, the 85/1.8 USM and 85/1.2L (I/II) both behave this way, as do most prime lenses.
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