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2" filters with Astrotech 0.8x FF/FR 130 EDT

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#1 mostvisited

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Posted 28 February 2021 - 02:55 AM

Hope other users could help me here. I have a Astrotech 130 EDT refractor and a Astrotech 0.8x FF/FR to use it for astrophotography. Recently I got a 2" Optolong L-Enhance filter and wanted to use it with the reducer but not able to find the thread to mount it. The description on astronomics site says 

The 2" telescope-side barrel of the reducer is threaded for standard 2" filters and has a safety groove.

Attached is a picture of that.  Currently its being used with a Canon DSLR so another side of it is attached to a T-ring. It looks like the 115EDT one has proper threads but not the 130EDT one. Any suggestions on how to use this reducer-flattener with a filter ?

Attached Thumbnails

  • 0.8x_reducer_flattener.jpg

Edited by mostvisited, 28 February 2021 - 02:56 AM.


#2 qswat72

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Posted 28 February 2021 - 03:15 AM

If I’m not mistaken, I believe it unscrews and has internal threads where you can mount a filter.

#3 mostvisited

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Posted 28 February 2021 - 03:27 PM

If I’m not mistaken, I believe it unscrews and has internal threads where you can mount a filter.

I thought it too. Tried with little pressure but looks like it is glued , it didn't move. I am afraid to try harder :-)



#4 qswat72

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Posted 28 February 2021 - 10:28 PM

In that case, I would have to assume it would be at either end of the flattener. I know the smaller flattener/reduced for the AT60ED has internal threads at the end of it.


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