1st - Working 9 to 5 by Cindyd photo - Canon DSLR Challenge photos at pbase.com


15-16 AUG 2007	Cindyd

pm to am that is :)

Clicking the Night Away,
every 30 seconds . . .940 times . . .

Perseid hit the bullseye at 3:18 a.m. on
try #692

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Canon DSLR Challenge		10-Dec-2008 02:26
I thought about a shot like this for the challenge, but it seemed like a lot of, uh, time! Love it! -CaryT

Canon DSLR Challenge		07-Dec-2008 16:34
Hi TV, This is a composite of over 900 individual frames. 30 sec exposures were used instead of a long exposure to avoid heat buildup creating too much noise. This was done in the summer - a winter shot might get away with one long exposure - however I don't want to spend the night out there in the winter ;). The downside of stacked exposures - they create a tiny gap between frames - and these are visible at anything printed over 8x12 inches or so - the trails look like dotted lines (at least all but the brightest trails do). Another problem is mirror slap shows up - no way to do mirror lockup, and even if you could, it would only increase that gap. Software does the stacking - so that is not difficult. I edited the final composite. Yes, that is Polaris. The North Star is not directly over the pole, but a few degrees off - so it makes an arc. Typically, you don't see such a distinct arc in these types of images because the exposure is not so long. At first I edited it out and put a dot because it bothered me. Then it bothered me that I had altered it so I put the arc back in. :) Thanks for commenting, Cindy

Canon DSLR Challenge		07-Dec-2008 14:39
Worth the effort. Pardon my ignorance but what are "stacked" exposures. Is this all done in camera on one frame or did you have to process so many images? Would that be the North Star in the center and why isn't it just a spot? -tv