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shutter speed for Mars photos?

Started by thoth11, 08/23/2003 02:44AM
Posted 08/23/2003 02:44AM Opening Post
Hi those in the know,

How long should I leave the shutter open on a Pentax K1000 camera in order to photo Mars? I realize film speed is an issue and I believe I have 400 speed kodak color film. It will be used in conjunction with a Vixen 140mm refractor f/5.7 and an Orion 8" reflector f/5.

Unfortunately I have only have taken one decent picture of M16 and a couple of the moon but for the most part it has been a shaky year of astrophotography. I will really appreciate the help because trial and error is getting expensive!

I hope to use this info tonight while it's a beautiful sky.

Cheers,

Don

PS I apologize for posting here. I was in the film section until I signed in and then it posted it here. Next time I'll sign in and then post.
Posted 09/03/2003 02:09AM #1
Don,

Go here and download Covington's exposure calculator. It will give you the answers you need, I think.

http://www.covingtoninnovations.com/astro/astrosoft.html

Alex