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I previously used a 200mm camera lens to capture an image spanning from Orion to the Flame Nebula and left that setup in place in the observatory while waiting for clear skies to return. When they did I was too busy to change the setup, so found a couple of targets suitable for this short focal length.

This is a narrowband image using H-a for luminance and S-2/O-3 for color, producing a somewhat unreal, but pleasing color scheme.

Tamron 80-200 zoom at 200mm, f/4
QSI 583ws with Astrodon 3nm filters
AP Mach1 mount
Approximately 6 hours total exposure

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Comment by Greg Marshall on February 27, 2015 at 3:59pm

Thanks, Chris.

Comment by Chris Elliott on February 27, 2015 at 3:32pm
ABSOLUTELY STUNNING!!!!
Comment by Greg Marshall on February 24, 2015 at 10:04am

The QSI camera has a built-in filter wheel. The camera attaches to the lens with an adapter I made myself. QSI actually sells such an adapter for Nikon lenses and theirs is better than mine, but rather expensive.

Comment by Dave Lane on February 24, 2015 at 9:45am

Do you have a filter wheel you connect the lens to?

Comment by Greg Marshall on February 24, 2015 at 8:54am

Thanks, Dave, and congratulations on yet another APOD!

Comment by Dave Lane on February 24, 2015 at 6:58am

Sweet as candy!

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