Test: Increased DR and lower noise with filter

Started Feb 14, 2006 | Discussions thread
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Philip_F Contributing Member • Posts: 570
Test: Increased DR and lower noise with filter

I tested what Julia came up with in this thread:
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17142860

I went to the terrace, took a custom WB and a shot including some highlights and deep shadows. Here's the shot:

Then I placed a 040M (40 magenta) filter in front of the lens, took another custom WB and took another exposure. Exposing for the highlights I had to add 4 clicks (4/3 stop or 1 and 1/3 stop) to get a result similar to the original photo. Look at the shadows:

It seems the DR is increased dramatically. Also, if you zoom in to 200% you will see less noise in the shadow area.
Thanks again Julia, this seems a very neat trick!

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Gov
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