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This is a 15min exposure ISO 400, not sure what blue image is upper left.

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Comment by Philip A Cruden on February 15, 2014 at 2:12pm

Cool image. The artifact reminds me of when I used to shoot A-Focal with my Sony camera.

Comment by William Neff on February 2, 2014 at 7:39am

Reflection internal is what I thought, 1 month ago I captured the same image with 2 different cameras, even moved Sirius completely out of view and the Blue image only changes position but still in same distance from Sirius, have imaged several other objects similar magnitude, over exposed with different ISO's and times, NOTHING like Sirius though.

Comment by Marc Basti on February 1, 2014 at 4:16pm

Looks like an internal reflection and a cool one at that. I've gotten a couple in the past when imaging near real kick A bright stars. On the plus side, Sirius came out mint. Marc


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