Widefield 7 Nm H Alpha Eta Carina area image

[tornado33]

Hi all
While I had a lend of Houghys Modded 300D camera I put on my 50mm F1.8 lens and carefully sat my unmounted Baader 7 Nm H Alpha filter on top of the UV cover filter that I leave on the lens, and shot the eta carina area
a single 285 sec. shot @f1.8 and ISO 1600, only the red channel was used, and converted to greyscale, no dark or flat fielding. Focussing was trial and error as one cant see a thing through a 7 nm H alpha filter.

[Itchy]

Hi Scott

Interesting experiment. I know of only one person doing succesfull narrowband imaging with a DSLR. He is from Germany I think.

http://www.pbase.com/gbachmayer/astropix

He uses a modified 20D. His secret seems to be lots of exposure (eg 15x10min for Ha)

Cheers

[tornado33]

Thanks Tony
I just went and had a look, he does have some good images there. gee the narrowband ones need a lot of exposures, no doubt due to the narrow band of transmission of the filters.

[Robby]

Nice one scott....
Dod you do it with the full moon? Does the moon affect HA much?

[tornado33]

Thanks
No I havent tried it with the moon up as yet, I should and see if it makes a difference, it mightnt hopefully :)
Scott