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22550RE: FLT 110, P-Flat IV, SBIG 8300c

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  • andysastropix
    Feb 25, 2014
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      Hi Ivor,Thanks for your comprehensive reply! Currently I have the SBIG 8300c screwed directly onto the back of the collar of the FF4. The setting is dialed to 66 and focus is good, but I'm getting eggy stars at the corners. Especially the top left cnr. When I adjust the FF dial upward everything goes out of focus! I'll try to attach a pic of the setup as is. So you think I need a spacer to get sharp stars? Cheers Andy
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