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Copernicus – Lightbridge 16, Canon T2i

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#1 JohnGraham


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Posted 16 March 2013 - 07:59 AM

Copernicus-2/25/2013 0h UT
Telescope: Meade Lightbridge 16 @ f/9 (OPT 2” 2x Barlow)
Camera: Canon Rebel T2i, 1.25” adapter, manual remote switch
Filter: None
Exposure: 4x1/500sec, ISO 400 saved as RAW
Mirror Lock-up: On, 5 second pause to allow vibrations to settle
Software: Nebulosity 2, Panorama Maker 3, Registax 6, Photoshop CS4

This was taken on the evening of February 24th, local time, about a day before the moon was full. Although I took enough images to build a mosaic (still working on that) I also wanted to take a short stack of images of Copernicus. The ray structure of this crater is simply amazing and I can’t help but wonder what it must have looked like when it was formed. I must say, building stacks of images are a heck of a lot easier than building a mosaic with an undriven altaz mount! To take the images I first set the focus with a Bahtinov mask and a nearby star. I then set the scope so that Copernicus would cross the center of the field. As it approached the center I trigger the mirror lockup with my wired remote switch, counted to 5 to let the vibrations settle, and then tripped the shutter. The resulting images are way over-sampled, so I binned them 2x2 with Nebulosity, stacked them in Registax, sharpened with a mild wavelet, and then finished the image in Photoshop. For these simple images Photoshop Elements would have worked just as well.


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  • Copernicus (2-24-2013)-1j.jpg

#2 MistrBadgr


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Posted 16 March 2013 - 12:21 PM

I did not realize the extent of the rays coming out of Copernicus quite like that. I knew they were there, but did not pay all that much attention to them. That is a great and very detailed picture, John. I think what you are doing, while exploring the capabilities of your 16 inch Lightbridge and a digital camera is really encouraging to someone like me. It shows that all kinds of things are possible.

Bill Steen
Bill Steen, Sky Hunters' Haven Observatory, Broken Arrow, Oklahoma

#3 Russell


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Posted 16 March 2013 - 03:58 PM

Wow, pretty fantastic shot.
Russell Hurlbert

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