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recommendation for field flattener for AT130EDT

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#1 NikonMike

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Posted 23 March 2020 - 12:45 AM

Wanted to get some recommendations on which field flattener would work best for the AstroTech 130 EDT

 

Thanks in Advance

 

 



#2 LPA

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Posted 23 March 2020 - 07:29 AM

See my post:

https://www.cloudyni...-do-full-frame/

The AT FF/FR, which isn't available now, works fine for smaller cameras like the ASI1600. For an APS-C sensor like the ASI071, the AT FF/FR shows some elongation around the edges of the FOV. For that size sensor and larger, like the new ASI2600 and ASI6200, I would recommend the Riccardi FF/FR as shown in my post.

 

Larry



#3 fmeschia

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Posted 23 March 2020 - 10:32 AM

It’s worth mentioning that the Riccardi FF/FR won’t work with the AT130EDT unless you replace the stock focuser like Larry did. The stock focuser takes up too much optical path to allow the Riccardi to reach focus.




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