High Resolution widefield image of Horsehead

Comment

Comment by Conor on January 9, 2012 at 12:28pm

Wow, they really are accentuated in that green channel. I wouldn't have thought polygonal filters would have caused artefacts like this. That's interesting.

On an unrelated note, have you had the chance to try out any of those new generation SBIG cameras? They've got some nice specs for the price, and that OAG for the ST-i is so very tempting. What do you think yourself?

Comment by Richard Crisp on January 8, 2012 at 1:39pm

The artifacts are most interesting Conor. Not sure what the cause is but I suspect corners in the filter wheel pockets.

the green channel shows them beautifully. There are no microlenses in the system

http://www.narrowbandimaging.com/incoming/green.jpg

I had a large rectangular sensor illuminated through square filters all behind a field flattener in the AP155

Comment by Conor on January 8, 2012 at 11:07am

That's a pretty incredible shot, Richard, as always. 15 hours is sheer dedication!

What are those artefacts around Alnitak? Are there microlenses in your setup somewhere?

Comment by Richard Crisp on January 7, 2012 at 12:20pm

Well thanks for the comment, Phil

Comment by Philip A Cruden on January 6, 2012 at 10:39pm

No more dew and good to go, very nice man

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