Is the 15-85mm really faster than 18-55 or 18-135?

Started Apr 6, 2013 | Discussions thread
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MaxCh
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Is the 15-85mm really faster than 18-55 or 18-135?
Apr 6, 2013

As I understand, the 15-85  has USM which makes it faster than 18-55 or 18-135? How noticeable is the difference ? The USM ens is supposed to make the lens quieter but I do not care about. I do not find 18-55 to be too loud.

I can't decide whether 15-85mm is a worthy upgrade from 15-55 or whether I should just get 18-135 to get the extra range.

Thanks

 MaxCh's gear list:MaxCh's gear list
Canon EOS 600D Canon EOS 7D Mark II Canon EF 50mm f/1.4 USM Canon EF-S 15-85mm f/3.5-5.6 IS USM Canon EF 70-300mm f/4-5.6L IS USM +1 more
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