Quote:
Originally Posted by alocky
What problems are you having with flats?
The pixinsight tutorial on producing calibrated flats is excellent- even if you don't use the software. Even without vignetting, which you will always get to some degree in any optical design, you will want to do flats because of the inevitable dust spots.
If you can take lights, you can get flats!
Cheers,
Andrew.
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Andrew my problem with flats is that I don't have a well evenly illuminated target to point the scope at and get good flats. It's usually dark by the time I setup the scope and when I take flats from any light source the resulting flat image is not typical vignetting pattern.
Peter.
I am still considering the qsi 683wsg and the fli 8300. But the value of the qhy can't be overlooked.
John.