The Filters We Need With Digital...

Started Oct 5, 2008 | Discussions thread
OP Joseph S Wisniewski Forum Pro • Posts: 34,130
I find them problematic...

Daniel Browning wrote:

Joe, any particular reason you didn't mention my pet favorite, magenta?

Hi Daniel. I've actually had this discussion with Iliah and Julia Borg before.

I find the magenta filter to be a bit tricky.

It's flat across much of the green response, and where it crosses over from its red to green plateaus and green to blue plateaus often misses the wavelengths where the camera's red, green, and blue filters are crossing over.

So it might flatten out the noise, but it also makes the crossovers look a bit strange, especially in the oranges, and a bit less in the aquas.

There are many outdoor lighting conditions where the red and blue
channels are between one and two stops lower than the green channel.
The use of a magenta filter in this case lines up the channels closer
together so that exposure may be increased, noise reduced, and
dynamic range increased.

True, but I'm still not convinced it's worth the side effects.

-- hide signature --

Rahon Klavanian 1912-2008.

Armenian genocide survivor, amazing cook, scrabble master, and loving grandmother. You will be missed.

Ciao! Joseph

 Joseph S Wisniewski's gear list:Joseph S Wisniewski's gear list
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