Hi Klaus,
Would UD glass make some much difference? Has it to do with price of UD glass that they didn't put it in?
Kind regards,
Reinier
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At the end of the day everything is a matter of design.
However, the lack of UD elements is a bit puzzling in the year 2016.
UD elements are often used to lower CAs.
By today's standards the lens is reasonably priced which may indicate some cost cutting measures.
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UD glass in itself is no magic sauce: I've perused the Canon camera museum a little and even the 17-40 has a Super UD glass element inside - but we all know the 17-40 is not a "wow" lens by any stretch of imagination. Ditto the 70-300 non-L (which has one UD piece inside). I guess we should hold our judgement until Klaus reviews the new 24-105... but again, there would be probably no way to directly compare them since I don't think you're going to test either the 24-105 II on a 5D Mark II or the 24-105 non-II on a 5DSR to give us a direct comparison. Or are you?
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I feel sorry for prodding you though.