In this thread:
a discussion was started about connecting a 2" flattener (FF) to an AT 115EDT. I started this thread to widen the possible audience to get more ideas.
I have a TSFlat2 inserted into the 2" EP adapter, not screwed into the focuser. On my rig, I do not have lateral "slop" but I do have tilt.
is what I think is the way to thread the FF directly onto the focuser.
I unthreaded the 2" accessory adapter from the focuser tube and measured the male thread and got 53.87mm. The FF has a standard 48mm female thread. So a 54mm male to a 48mm male should do the trick.
Unfortunately Agena is out of stock and like so many parts coming out of China, there is no ETA due to the corona virus disruption. I looked on Aliexpress and found what looks to be an identical unit for $13 USD. I ordered it and have my fingers crossed. When/if I get it I am going to douse it in acetone and set it on fire before I use it
I suspect that what the poster in the other thread is experiencing is lateral slop due to the 2" compression ring not squarely sitting in the safety bevel.
Some folks like this flattener because of the self centering feature:
The AT 2" 0.8x reducer/flattener for this scope has the male 54mm threads as part of the barrel so it is curious that the flattener does not have the threads.
Edited by santafe retiree, 22 February 2020 - 01:09 PM.