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Tele extender+DSLR+scope for DSO?
Morning everybody,
recently I tried shooting M74 from my backyard with a 6" F5 newton and a 450D. 10x10min shots + the usual.
After stacking and opening in PS I deleted the lot as there was not much more than white noise and a faint small hint of a galaxy drowned in the white glow.
Now I am thinking about getting a Canon 2x Telextender to increase magnification (for a bigger target) and reduce skyglow (by increasing fl).
A barlow is not really my favour as this extends the lever on my focuser and the coupling with only one little screw from the side appears not very trustworthy.
Has anyone used a Tele extender+DSLR+scope for DSO shooting? Or some theoretical input. I donīt want to buy one to find out that i.e. backfocus is insufficient etc.
Thanks for all advice!
Cheers
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