USM or not

Can someone explain the difference between the EF75-300 and the EF75-300 USM lens? Pro's, Con's to not having the USM? Thanks in advance!

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Beth

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A very nice explanation to your question is at

http://www.photo.net/photo/canon/lens-motors.html

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"pro's, con's to having/not having the usm lens".

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The motor on the 75-300USM will be quieter, for this, you will pay

about $30 more for the USM. Focusing speed, front element rotation,

etc.. will be similar in both.

There's also a review of the Canon XX-300mm family on the photo.net <a

href="http://www.photo.net/photo/nature/x-300.html"><b>nature

forum</b></a>. One thing to remember is that the 75-300 USM is a

<b>micro</b> USM, not the <i>really</i> quiet <b>ring</b> USM. It's

still quieter, and it focuses quicker (IMO, anyway; that's probably

subjective). It doesn't give you full-time manual focus like the ring

USM, if that's important to you. There's an opinion that it's a

little soft at the 300mm end; I haven't found this to be a problem,

but again, that's my subjective view. I've been really happy with

this lens...

Beth, the only difference between the two lenses you mention is the

USM motor. That is it, the construction, the glass, everything else

is the same. The first lens has the typical micro motor found on most

lenses, while the second has the micro USM motor which is much quieter

and usually quicker. IMO, if you can afford it, spend the extra $35

and get the lens with the USM, I think you'll be much happier in the

long run. Good luck.

Thanks to everyone for your help!! I decided to go ahead with the

USM!

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Beth

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To reply via email please remove the no spam from my address.