2" Barrel extender to fit HoTech "Field Flattener
Posted 24 January 2013 - 03:51 AM
Have my modified canon 350D rebel connected to field flattener inserted into 80mm focuser draw tube of my AT111 EDT Apo I cannot quite get focus.
Any help will be greatly appreciated.
Posted 24 January 2013 - 04:37 AM
Hi, can anyone out there give me directions on where to find a 2" barrel extender with male thread to fit into 48mm female threaded end on my 2" HoTech field flattener and provide an additional 20mm back focus which Iam short of.
Just to be clear:
Do you need "backfocus" or do you need more "outward" focuser travel. Backfocus is "inward focuser travel".
Posted 24 January 2013 - 10:21 AM
Posted 01 February 2013 - 05:23 AM
Hope this clarifies things for you.
Posted 01 February 2013 - 04:45 PM
Have the correct back focus of 55mm for canon and flattener set up but will use a 2" threaded tube extension to sort things out.
As for eye viewing I got good clarity of Jupiter's cloud rings so should be able to do better with multiple and long exposure shots once I get the extension tube.