Hi all, I am new to this forum and have a question regarding the Istar Asturia TCR 150-12 R35. I currently have a Celestron 9.25 Edge on the Advanced VX mount and am wondering if the TCR 150-12 R-35 would work on it as well. I know the weight would be OK, was wondering about the long moment arm each side of the mount head. Thanks Dan
Hi Dan and welcome mate , I think our member Matt ( Boomboom ) would be best to answer your question as he has been where you are now , my thoughts are that the VX will work but it might become a pain ( vibrations ) over 100x or so , but one of those 'Hargraves struts' might be on the cards ? you can only try it old mate , the 150mm f12 would be a planet killer , or what ? nice . I have a home built 127mm iStar f8 on an HEQ5 and this works well . Brian.
C9.25 XLT on HEQ5
Istar 127mm f/8 doublet on HEQ5
Takahashi SKY90 on Vixen SP
I have the Istar Perseus 6" F/12 refractor which poses similar mounting challenges to your scope I think.
From my experiences I really don't think the Advanced VX mount is going to be up to the job. The nearest I've got to a satisfactory mounting solution is an EQ6 on a Meade Giant Field Tripod which is much more substantial than the Advanced VX and even that was not really steady enough for the long tube.
It's not the weight but the tube length (as you suspected) that is the killer here.
Hi Dan, It's as John says really. I had to look up your mount which seems the same as an EQ5 ….no where near enough. The smallest mount I would and occasionally still use is the NEQ6 or Atlas to the US cousins! Even then I use a Rigel systems electric motor on a GSO Linear Bearing focuser to help with the wobbles. A lot of the wobble comes from the awful dual Vixen/Losmandy saddle plate. An upgrade saddle plate would help a bit too. A better bet..Losmandy G11. Matt