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Imaging in Ha - Faint Galaxies
Hi all, I have been trying to image some faint induvidual galaxies and galaxy clusters in Ha but have been having mixed success.
They dont seem to come up as well as in Lum if at all, could this be as a result of the wavelength I am imaging on and the type of light being emitted.
Would I need to extend my exposure times for Ha as well, generally around 20 second images x 100 subs in alt/az is usually sufficient.
All thoughts greatly appreciated
Cheers
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