If you think about it, this is the whole reason you use a filter, and it is similar to how filters work with film. When you use a red filter with black and white film, blue sky looks black because light in the blue range of the spectrum is blocked. It doesn't look totally black because the sky doesn't emit a single wavelength.
The key thing to remember is that you don't actually directly view the raw files out of the camera. You also don't view individual layers of film emulsion either, you look at the combined effect of layers sensitive to R,G and B. Film does this by stacking color sensitive layers, DSLRs do it via a filter array and processing algorithm.
I think tv said it best here:
> Blah blah. > > Wah.
Which means, the images that come out look great, so who cares how they get there? If I had the money to buy one, I'd be shooting with it instead of theorizing. Well, no, I'd still be studying right now, but I'd definitely be shooting more than I am.
-Matt
On Tuesday, October 21, 2003, at 10:01 PM, mishka wrote:
my example was about camera with a red filter on. in that case,
you do lose 2/3 of data (as all green and blue pixels will be just black). or, equivalently, taking only red channel in photoshop.
of course, this is a border case.
mishka
This of course doesn't mean that taking a B&W photo on a 6MP camera results in a 2MP file. You still record all channels and the camera creates a 6MP file.
