RE: [APML] planetary photography

["Mark Park" <mark_park@hotmail.com>]

Thanks everyone for your replys.  I have a homemade Hartman that I may try.  
I agree that you get better images with a CCD.  However, I have not been 
able to get good color from mine.  I'm not sure if the filter I have are 
really RGB.  Everything I combine yeilds orange!  I do have some fairly good 
B&W images from the CCD.  I'll take another shot with the 35mm using your 
suggestions and see what I can come up with.  Thanks again!

>Date: Tue, 15 Jan 2002 22:51:08 -0600
>From: "Jason Lewis" <jlewis@nomoon.org>
>Subject: RE: [APML] planetary photography
>
>Mark,
>
>I've had best luck using my focusing screen when using eyepiece
>projection of planets.  I attempted to use a knife edge focuser on a
>nearby star, but the knife edge image in this configuration isn't
>easy to use for focusing.  In my 12" SCT, I am able to get an image
>that is large and bright enough to discern planetary detail on the
>focusing screen.  Even then, I still bracket exposure times,
>refocus, repeat...
>
>There are several formulas out there for predicting focal lengths
>with eyepiece projection, but you'll probably get best results
>through trial and error.  I have best results by keeping exposures 2
>seconds or below for Saturn.  For Jupiter, my best configuration
>gives exposure times of about 0.5 seconds.  Play with your
>configurations, bracket, and note the best exposure times for each
>configuration.  I only get good results when seeing is incedibly
>good.
>
>Jason
>


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