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Full moon pics on a 8" celestron Dob? How?

Started by erik_hammarlund, 04/19/2003 03:43AM
Posted 04/19/2003 03:43AM Opening Post
I've got a Nikon F3 manual camera and a 5 year old celestron cardboard-tube Dob; 200/1200 (f6). I don't have any special focuser.

I'm really only interested in taking pics of the moon, not stars, preferably on the slowest available film speed. to be honest, I usually shoot 100 speed film smile though I'm sure that won't work (or will it? the moon IS really bright...) but perhaps a moon guy could tell me what upgrades--hopefully cheap ones--I would need to be able to get a few pictures?

What is the slowest shutter speed I can use without getting image blur?

Thanks,

Erik
Posted 04/22/2003 12:45AM #1
Erik, taking pictures of the moon is fairly simple, you will just need a T-ring for your camera and an adapter that connects the T-ring to your 1.25" focuser. The only issues that I can think of are making sure your focuser has enough in - travel to accomodate the camera and probably rigging up a temporary weight on the back of the scope to keep it from falling down from the weight of the camera.
The slowest shutter speed you will be able to use should be around 1/15 or 1/30 of a second. If you shoot the full moon w/ 100 speed film, the exposure should be about 1/250. Quarter moon will be around 1/60 or 1/30; Crescent around 1/15.
Just be sure to use the mirror lockup feature on the camera and a cable release to trigger the shutter to minimize vibration.

Clear Skies,

Joplin