Quote:
Originally Posted by White Rabbit
Could someone explain the beniffits of using a light box to do flats as opposed to correcting in photoshop. It seemed to work really well when I tried it and it seems to be much much quicker than taking flats manually.
Sandy
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Sandy, when you take a proper flat, you are imaging through the actual optical train.
This allows you to correct for more than just vignetting, you also correct for dust and other optical imperfections.
Applying proper flats allows you to stretch the data much more when processing.
Using PS to correct vignetting is really only suitable for single snapshot type images.
You are much better off applying proper flats to your data when calibrating your subs.