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 Post Posted: Fri Jul 14, 2017 5:00 pm 
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Joined: Fri Jul 14, 2017 4:48 pm
Posts: 1
I recently purchased the EFW and need to some help with the backfocus on my EdgeHD11. With the C11 backfocus being 146mm I have the .7X reducer, standard celestron T-adapter (if needed), EFW, ASI290MM. What kind of additional spacing would be required for this imaging train? 16.5mm?

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 Post Posted: Wed Jul 19, 2017 1:36 am 
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Joined: Mon Apr 24, 2017 10:08 am
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Hi privateer
I don't know how length of celestron T adapter, If you can get the number, I will do the math!

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 Post Posted: Tue Nov 07, 2017 1:11 am 
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The Celestron T-Adapter is ~ 91.05mm per https://s3.amazonaws.com/celestron-site ... _final.pdf

I hope this helps.


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