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07/09/2009 08:30:20 AM · #1 |
Hi,
I read a lot here about editing images with "USM". I only know USM Canon lenses... anybody enlighten me?
thanks! |
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07/09/2009 08:40:09 AM · #2 |
:-) USM means unsharp mask, a method of sharpening images in post processing. |
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07/09/2009 08:40:18 AM · #3 |
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07/09/2009 08:46:27 AM · #4 |
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07/09/2009 09:03:00 AM · #5 |
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07/09/2009 09:21:48 AM · #6 |
| thanks all for the detailed responses! |
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07/13/2009 12:52:58 PM · #7 |
| On the canon lens, it means ultra-sonic motor. which is a quite drive motor for focus. |
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