Hi All,
After a number of years as an observer, and a little bit of (mainly) DSLR imaging, I've decided to head down the autoguiding/dedicated camera route. I have a mono ASI290MM camera and a seven-filter wheel. At the moment, this is loaded with:
Clear focusing filter (same glass thickness as the narrow bands)
RGB filters
Ha, Oiii, Sii narrowband filters.
My question is this: the clear filter is not (I believe) IR blocking. I do have a L-IR CCD filter. What are peoples thoughts if I added this permanently onto the filter wheel nosepiece? Obviously this would add more glass for the light to pass through. The RGB's are also IR cut but I'm not too sure I could use the clear focusing filter to capture luminance's with the RGB filters.
Any guidance always welcomed!
Many thanks,
Andrew