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Old 10-06-2008, 05:56 AM
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Kirkus (Kirk)
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Beginner's question: Barlow for DSOs?

This idea is probably too simple. There has to be something I'm not thinking of.

I haven't noticed a lot of photographs (if any now that I think about it) of DSOs that have been taken using a barlow or PowerMate, or anything else like that.

I want to try and image something like the Ring Nebulae using a barlow. Obviously tracking would have to be dead on and the exposures would need to be long (5 minutes, 10 minutes).

I'm still learning and am curious if I could expect success.

Would this be:

or would it be:
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Old 10-06-2008, 06:33 AM
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bindibadgi
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Just remember, for the same exposure, if you use a 2x barlow you will need to multiply your exposure time by four.
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Old 10-06-2008, 06:48 AM
Dennis
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I think that Eddie Trimarchi has done some very impressive Barlow amplified DSO imaging with his 6" Mak-Newt. I reckon it would be a tough undertaking.

Cheers

Dennis
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