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Old 29-09-2019, 05:45 PM
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thunderchildobs is offline
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Suggestions for a Coma Corrector for 8" F/4 and SBIG 8300C

I am looking for suggestions for a coma corrector / field flattener for use with a 8" f/4 Skywatcher Quattro and a SBIG 8300C CCD.

I have seen this at Bintel, SkyWatcher f4 Aplanatic Coma Corrector

Is this suitable?


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Old 29-09-2019, 07:34 PM
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Paul Haese
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It looks very similar to the GPU corrector which is sold by TS in Germany. If it is this will be fine. I am using the GPU on an f3.8 12" and it works well. Watch the back focus distance though. You need to get this correct for proper correction.
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Old 05-10-2019, 06:22 AM
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Benjamin (Ben)
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I also have the skywatcher f4 Coma Corrector and it seems to do a great job when the back focus is correct. I have a Baader mark III Mpcc I can lend to you if you want to try that out first?
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Old 05-10-2019, 05:45 PM
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Camelopardalis (Dunk)
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I have the GPU corrector, which I believe is the same as the Skywatcher Quattro coma corrector.

I find that, with my ASI1600 - which is roughly the same size sensor as your 8300 - if my collimation is spot on, I get round stars across the field.
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