Thread: venus 3rd sept.
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Old 03-09-2005, 10:51 PM
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asimov (John)
Planet photographer

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Join Date: May 2005
Location: Bundaberg
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I also made a 3 holed mask for the 12.5" that I swear by. It effectively cancels out diffraction spikes as seen in a newt reflector, also as a glare cut back on bright objects. Yep, the trade off is less light grasp because your cutting the aperture back considerably. On jupiter, it works great though.
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