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  #1  
Old 05-01-2019, 07:00 AM
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john guy (John)
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help please

I have a atik ccd 383l and I if want to use a meade focal reducer 6.3 with my 14'' sct do I need to add a spacers and work out a back focus distance between reducer and ccd. any help much appreciated
regards J G
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  #2  
Old 05-01-2019, 07:45 AM
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Marke (Mark)
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John if its a regular XLT then probably not if its a HD then you will . Celestron have a chart that shows backfocus distance and FOV coverage , look that up mate.
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Old 05-01-2019, 07:46 PM
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thank you
regards
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Old 05-01-2019, 08:13 PM
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Quote:
Originally Posted by john guy View Post
thank you
regards
There will be an optimal distance to cover a full frame sensor a smaller sensor you have a lot more leeway
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