"Mr. Bill" <[EMAIL PROTECTED]> wrote/replied to:

>I'd just like to know, why in it's FD incarnations, they could get the 
>1.4 to look through a 55 and 52mm filter, but with the EF it's got to 
>use 58mm?

58mm to keep as many lenses as possible with the same filters. Canon
strives to help photogs minimize filter selection. 77mm is a standard
for larger lenses. Only a very few have odd sizes.

Plus of course, there's a motor in there :-)

As to barrel distortion, I find it minimal on the 1.4.

-- 
Jim Davis
Nature Photography
http://jimdavis.oberro.com
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