Hello Skip
I have this lens and cannot recommend it highly enough. It is well built,
quiet and very sharp. I have not used the f2.8 but I believe it is almost
twice the weight. I decided to go for the f4 rather than the f2.8 because I
felt it would be more practical and less likely to be left at home than the
bulky f2.8, furthermore it is a practical handheld lens. It has been claimed
that it is actually higher quality than the f2.8 and it certainly contains a
lot more fluorite elements than the f2.8 if that is any measure of quality.
I read a review in Amateur Photography where the guy doing the bench testing
said that in 27 years of testing zooms in this range this was the finest he
had ever tested-in terms of optical quality, construction, design and ease
of use. I frequently use mine with the Canon 1.4x & 2x extenders and the
images remain remarkabley sharp. With the 2x extender one has to use manual
focus but I find the design of the lens so good that reverting to MF is
completely natural and easy to do. Go for it !!!
In reply to Kenneth Darling Sorensen regarding the hood for this
lens, mine is the ET-74 and it definetly fits perfectly.
kind regards
Gawaine
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