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View Full Version : What does "Sharp Cut" mean?


fomoz
10th of June 2006 (Sat), 13:16
I'm looking to buy a 17-40mm f/4L and I want to also pick up a UV filter for protection for it at the same time. I came across this one: Canon 77mm UV Haze L-39 Sharp Cut (http://www.amazon.com/gp/product/B00021OCRO/ref=ord_cart_shr/104-7620273-3408753?%5Fencoding=UTF8&m=ATVPDKIKX0DER&v=glance&n=502394). I was wondering what Sharp Cut means, is this just and ordinary UV filter?

Hermeto
10th of June 2006 (Sat), 13:35
It is NOT multi-coated!
Other than that, seems to be okay..

http://www.digitalcameras-store.info/tovar4230303032314f43524f.html (http://www.digitalcameras-store.info/tovar4230303032314f43524f.html)

‘Sharp Cut’ sounds like commercial trick, at least to me..

PaulB
10th of June 2006 (Sat), 13:36
Means that the filter stops every wavelength beyond a certain value with no 'bleed' past that wavelength. Most filters have a certain +/- around the stated wavelength they block - not usually a problem unless you are doing very accurate stuff.
You may notice that 'sharp-cut' filters tend to cost more than ordinary filters!

Hermeto
10th of June 2006 (Sat), 13:40
Thanks PaulB!