Thread: Keyhole Nebula
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  #6  
Old 15-04-2016, 09:55 AM
Mickoid (Michael)
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Join Date: Feb 2016
Location: Melbourne, Australia
Posts: 1,533
I find focusing difficult with this scope. Being an achro refractor and a modded DSLR, trying to find a focal point to choose when each wavelength focuses at different positions is a bit hit and miss. The full spectrum sensitive sensor tends to bloat bright stars anyway.
Much easier on my 200mm f5 newtonian with a Crayford focuser. Not a great fan of cheaper Rack and Pinion draw tubes, the image moves all over the place while trying to focus. I also did a soft blur in PS to reduce noise, as you would appreciate a warmish night at 3200 iso not a good combination for smooth results.
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