American Nebula - again!
Another clear night for a short while and after much buggerng about with new ED80 I ended up going back to my Sigma APO instead. Windy conditions made my available sky limited so I opted for the American Nebula again. This time I took into account white balance to compensate for the Astronomik CLS filter.
Click for larger image
9x3mins, ISO800, 149mm, F4.6. Canon 450D + Astronomik CLS + Sigma APO 70-300mm.
Note for Will: Here are the links I mentioned. TIFF and Canon 450D RAW of one of the single unprocessed subs that went toward producing this image of the American Nebula. The cyan cast is caused by the Astronomik CLS filter.
14.56MB .CR2 version
70MB .TIFF version
Hope you have broadband!
Click for larger image
9x3mins, ISO800, 149mm, F4.6. Canon 450D + Astronomik CLS + Sigma APO 70-300mm.
Note for Will: Here are the links I mentioned. TIFF and Canon 450D RAW of one of the single unprocessed subs that went toward producing this image of the American Nebula. The cyan cast is caused by the Astronomik CLS filter.
14.56MB .CR2 version
70MB .TIFF version
Hope you have broadband!
Labels: Astronomik CLS, Astrotrac, Canon 450D, Sigma 70-300mm APO
posted by Phil Lowe at
11:33
1 Comments:
Hi Phil
will@dulyn.e7even.com
I have put together a system including 80mmED Pro, 100mmED Pro, HEQ5 Pro mount, Orion Starshoot Autoguider and Canon 450D unmodded.
This replaces my old Fullerscopes 12" Newt with analogue drives.
I did my first (long) imaging session last Friday and would like to exchange some images with you, if you can give me your email address. Up to you.
I`m really interested in the use of an Astronomik CLS filter. My images were quite affected by light pollution despite being quite rural. 5mins at 1600ASA was quite "red" and required a lot of work in Photoshop to get reasonable results. Does the filter resolve this problem? does it require extra exposure time?
Regards, Will
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