With the constant asking of questions like
-"Which UV filter is best? "
-"Will a UV filter degrade my image?"
And a personal desire to see the degree various UV filters will degrade my image, I have done a small experiment.
I hope this is the right place for me to publish my findings.
Filters that were tested (I only own these, tested on 1 sample of each) :
- No Filter (as reference)
- Hoya HMC UV(N) Japan
- B+W 010 1x MC, Multi Resistant
- Hoya UV Philipines
- Nikon L37C
Camera was tripod mounted, 1/60 f8 on a 80-200 AFS @ 200mm, flash on manual, Auto WB. Sharpening off.
Target image :
Centre area was magified 300% and cropped, the cropped image was doubled dpi no sharpening, no correction was done .
Original 100% cropped can be viewed at:
No Filter : http://img216.imageshack.us/img216/1...891nofi8ai.jpg
Hoya HMC : http://img216.imageshack.us/img216/7...4892hmc0ar.jpg
B+W : http://img216.imageshack.us/img216/1...4893mrc8mw.jpg
Hoya UV : http://img216.imageshack.us/img216/4...f4894uv5vs.jpg
Nikon L37C : http://img216.imageshack.us/img216/6...895l37c4ad.jpg
I leave the conclusion open for discussion ...