What is your favourite trick?

Started Aug 19, 2004 | Discussions thread
Kent C Forum Pro • Posts: 25,803
Re: why so much usm?

gail wrote:

ajay kumar wrote:

USM Amount 15-30.
Radius 250 (max)
threshold 0

I'm new to some of this stuff, but I usually never set USM to over
1, with a radius of about 150.

Seems like these high numbers that so many have mentioned would
ruin an image.

What am I missing?

It's a 'haze fix' or contrast adjustment - take a 'foggy, hazy image' and start with 30,60,0 and then increase to tweak - 40,80,0 etc. I can blow out highlights, but use a layer mask to tone them down. See:

http://forums.dpreview.com/forums/read.asp?forum=1006&message=10227992
--
Kent
http://www.pbase.com/kentc

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