Digital BW, The Print

Stephen M Martin wrote:


> Can you explain how you do this? 

You are going to hate me for this....

The cheapest/easiest way to do this to raw images from Canon and Nikon 
cameras is to get a hold of this freeware:

http://www.astrosurf.org/buil/us/iris/iris.htm

The instructions provide a method to subtract bias and flat frames 
before Bayer interpolation, which is when (ideally) you really want to 
do it. The learning curve for this software will likely seem fairly 
steep. If you get the software and find you need to know how to generate 
the calibration frames to begin with, I'd be happy to explain.

--
Jeff Medkeff
Eagle River, Alaska