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Old 30-12-2010, 05:28 AM
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mswhin63 (Malcolm)
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mswhin63 is offline
 
Join Date: May 2009
Location: Para Hills, South Australia
Posts: 3,622
Apodising Mask test

Hi Daniel and anyone interested,

I have mixed feelings after testing a mask I made. My first test was visual, and as the post describes is a horrible diffraction node coming out from a bright target like Jupiter. I am quite sure that the moon would be terrible.
One thing I noticed was in the centre Jupiter was so clear I could even see the a shadow of Io on Jupiter surface. This I have never seen before.

It took me a while to remember but managed 2 sequences of Jupiter shots. The air conditions where I live are horrid at the best of times so it was a good test, although I would rather a better test run another day as the humidity didn't give me enough time to setup properly.

The first image is the Apodising mask put together but not permanently. It is quite easy to make although cutting circles in fly-wire is difficult. Lots of pin holding it together. Removing the mask left me with a neat aperture reduction screen for some bright planets on good day. My webcam is very sensitive.

The second image was a fast test with the mask, while the third image is without the mask. I am surprised by the results, and still do not want to finalise my results as yet without more testing. It is just my way of testing.
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