Quote:
|
Originally Posted by JohnG
You have an interesting situation happening here, I would normally say to people don't exceed 2/3 the capacity of the mount, only having 1 Kg to play with leaves little room to play with. I would be loath to place another OTA above because of centre of gravity issues and having to place weight on the countershaft further down which introduces it's own problem's.
The only other solution I can think of is an Off Axis Guider, I have never been a fan of these because of the small pick-off mirror although there are some around these days that can be rotated. I suppose a problem is going to be the LPI and selecting a guidestar that is bright enough.
I feel you are going to be very limited although Vixen probably understate the mount capacity a little.
JohnG
|
Pretty sure you are right there Vixen will be conservative - there are users out there with 10" tubes on this mount....but I want to stay as light as I can. I also have the incompatible desire to have a high quality guidescope that I could use for widefiled imaging and as a grab and go...looking at and ED66 perhaps?
I started this saga with the Vixen OAG for exactly these weighty
reasons, unfortunately it turned out that the OAG could not be used with the Vixen FR thus rendering it all but useless. I have tried (without luck so far) to identify a compatible OAG that people rate - the closest is the Lumicon Giant OAG but this needs customisation....then as you point out the LPI sensitivity is an issue, I suppose using as DSI as the guidecam would fix that - if this is the best path to take, any advocates of the OAG method out there care to comment?