Search found 4 matches

by Lance McVay
Sun Dec 02, 2007 8:32 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Aurora in the Distance (APOD 19 Nov 2007)
Replies: 38
Views: 14112

I believe it is a reflection of the moon, colored by the lens coating. If you look at the rocks at the bottom of the scene, you will notice they are lit by a source to the left, which was the moon. The artifact shows the same phase as the moon was that night.
by Lance McVay
Sat Dec 01, 2007 9:52 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Aurora in the Distance (APOD 19 Nov 2007)
Replies: 38
Views: 14112

One thing to keep in mind is that this is an extremely wide lens at 12mm rectangular. It's nothing like a telescope lens in any form. I've owned fisheye lenses that weren't this wide. I'm also using it for what was most likely not its primary designed purpose, which is a lot of night time shooting w...
by Lance McVay
Tue Nov 20, 2007 9:51 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Aurora in the Distance (APOD 19 Nov 2007)
Replies: 38
Views: 14112

Actually I did want to ask, what is the red glow at the base of the mountains just to the right of centre? That's glow from the Forest Service Mendenhall Glacier Visitor's Center. Their lights do seem to have quite a red glow about them. In this photo , those lights are providing the foreground lig...
by Lance McVay
Tue Nov 20, 2007 3:12 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Aurora in the Distance (APOD 19 Nov 2007)
Replies: 38
Views: 14112

Thank you all for the kind comments. The object near the moon is, as far as I know, nothing more than lens flare. I was using a 12mm lens at full aperture, and in my experience, pointed at a bright light source, this lens will definitely flare. The photo was taken early in the morning of October 4th...