That's what I have been doing. I've been using the daylight film
equivalent of 3200K, but when you add any Wratten filter for B&W images the
camera corrects for the filter and you end up with an image that looks like you
were not using a filter at all. I found this out when I was attempting to take
B&W images of a bunch of green native punch grass, using a variety of filters
to enhance the green foliage. They all came out identical to the non-filter
image.
What I've resorted to is first taking the best colour image I can,
sometimes using a light warming or cooling filter to do an end run around the
camera's processing. Then I post process by first brightening the image (to
simulate changing the shutter speed) and then using FilterSim to add the
Wratten filter. I then put that into a B&W conversion utility to convert to
B&W. I have to do all of that on a WinXP machine as Win7 will not let me
install any of that software.
I do get good results, but it's a lot of work. So, I'm going to go back
to the Wratten filter experiment, this time using RAW to shut off the camera's
processing.
>
>Can’t you just use a fixed colour temperature in the camera? The
>camera-set colour temperature might still affect the RAW image, just
>as auto-exposure does.
>
Chris
When the going gets weird, the weird turn pro
- Hunter S. Thompson
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