On Thursday, October 2, 2014 12:32:52 PM UTC-5, Davoud wrote:
Uncarollo2:

It's hard to see H-alpha. Best you can do is with an H-beta filter, or a

narrowband nebula filter. Still, these are faint clouds that are recorded

easily with a fast optical system. At 12" aperture and F3.8 this is achieved in very short exposures of 300 seconds or so.



Or with slightly longer exposures with a 4" or 6" aperture, as seen at

http://www.primordial-light.com/deepsky8.html!



--

I agree with almost everything that you have said and almost everything that

you will say in your entire life.



usenet *at* davidillig dawt cawm

Those are great images.

Yes, you don't need a 12" aperture to capture clouds of the Milky Way. You can do it with a 50mm lens if need be. But if you have the aperture, why not ;^))

UncaNebula