OAG with a refractor and FF
Posted 19 February 2011 - 06:26 PM
Does anybody use an OAG on a refractor with a field flattener? Are there FF with larger chip-to-flattener distances that are good for this sort of application?
Posted 19 February 2011 - 06:27 PM
Posted 19 February 2011 - 11:05 PM
I'm sure they'll move this but there is an OAG out there with only 9mm of thickness. Google: TSOAG9T2
Posted 20 February 2011 - 11:01 AM
As far as putting the AT2FF after the OAG - there are 2 reasons why I thought this might be problematic. The first is that the guide camera would have to be WAY out to be able to achieve focus at the same time as the imaging camera. The second reason is that I don't know how I would attach the AT2FF (that has a 2" barrel connection) to most OAG's that have T-thread outputs.
The main reason I posted the thread is that I was wondering if anyone actually did use an OAG with a refractor setup, and if so, how was it done.
Posted 20 February 2011 - 01:04 PM
I understand that you'll need to put the autoguider way out to achieve focus - I didn't realize this beforehand. As far as attaching the AT2FF is concerned, the Hutech OAG5 can be purchased with a 2" adapter (which connects to the camera side). The AT2FF should slide right in there.
Contact Hutech and Ted should be able to find all the parts you need. They have a very extensive library.
Posted 21 February 2011 - 09:23 AM