Vixen porta mount
Posted 20 April 2009 - 08:13 AM
About 2 years ago I bought the Vixen porta mount for my Coronado pst. It works fine for this scope. I have an opportunity to buy a 90mm Williams flourite refractor or a Celestron 5" spotter.I was wondering if anyone had any thoughts on which scope (weight)would work for this mount? The reason I ask is that someone I talked to at the telescope dealer here in MI said they put a Williams 110mm refractor on the Vixen porta and it ground up the vertical and horizontal bearings even though the weight was within the limits for the mount. Any thoughts would be appreciated.
Posted 20 April 2009 - 09:12 AM
Posted 20 April 2009 - 09:19 AM
just adjust the tension so it holds with no over tightening, Be careful to balance the scope.
I been using this combo for about 2 years with out any problems. One accessory to get is slow motion cable extensions. The ones provide are not very durable.
Posted 20 April 2009 - 09:31 AM
I know of another gentleman that has a SV 102 and he had alot of problems using the Porta and wound up ruining the mount trying to lock down the alt to keep the thing balanced.
Posted 20 April 2009 - 10:32 AM
The perfect marriage seems to be the TV-85 on the Portamount. For some reason the weight/length combo makes that scope perform well on the mount. When focusing, even at high mag, I see very little vibration.
Posted 20 April 2009 - 10:35 AM
Thank you for your thoughts. I have the long slo-mo cables and those short stick ones and they work ok.
I think I would be about 9 or 10#'s w/the WO 90mm and about 7 to 8#'s w/the 5" sct tube, but I think the sct tube is shorter than the refractor.
Posted 20 April 2009 - 06:10 PM