View Single Post
Old 03-17-2008, 03:36 PM   #10
Wizzo
Senior Member
 
Wizzo's Avatar
 
Join Date: Jun 2007
Location: Oxford, UK
Posts: 545
Default

Quote:
Originally Posted by alan-crotty
So you must either spot meter from an 18% grey area, or know how many f stops lighter or darker than 18% your target is.

See

http://en.wikipedia.org/wiki/Zone_system

For a detailed explanation.
Alan
Thats an interesting read - thanks

Estimating how much darker or lighter a target will be is certainly a challenge with the livery variations around at the moment
__________________
STEVE

Press here to see my pics on railpictures.net

More pics here D1059 on Flickr
Wizzo is offline   Reply With Quote