Info about Vixen Porta Mount, older version
Posted 20 October 2013 - 04:48 PM
There's a second hand Vixen Porta Mount I consider buying, older version, with the according mounting plate.
I like small telescopes that I use as standalones or besides my 6-12" ones. I currently use three, a WO 66ED refractor, a 102mm C4 MCT and a 130mm SW Heritage Dobsonian. For the first two I use a Manfrotto tripod (great for terrestrial but difficult for astronomy, with the stock 3D head) and a ultralight weight Bresser AltAz mount with slow motion controls (flimsy but it helped me appreciate the slow motion manual controls). I can mount all three on my Nexstar 6/8 SE mount but I prefer no electronics for those widefield or planetary sessions. I don't do photography.
For a couple of years I am thinking of a better lightweight, manual AltAz mount. A few are available here: SW AZ3, AZ4, AZ5 and Vixen PortaMount II and mini Porta Mount. A friend of mine had the Mini and he told me not to get it, as it is insufficient for planetary. AZ3 the same. AZ4 and AZ5 are better with steel tripod (reminding the Nexstar) but less portable and no slow motion. I targeted the Portamount II but now the older model comes as a bargain.
What do you think? Will that suit me?
I use 4 0.5kgr of gym's wrist weights to lower the weight center and three vibration suppression pads with the Bresser; I will use it with the Porta also. My tubes are all short and lightweight but I regularly put ES100s and Nagler T4s/ Delos on the focusers. The Mak is used in higher magnifications but the others too occasionaly. For heavier work I rarely will use my Nexstar mount that is very steady for such organs (the Heritage has the Dobson mount also).
Thank you in advance.
Posted 21 October 2013 - 02:20 AM
Posted 21 October 2013 - 03:23 AM
I bought a Porta mount a few years ago without the tripod.
My Porta mount is good for short OTA weighing up to about 12 lb.
K W TONG
C8+CG5 GT, TSA102+HEQ5 PRO, MK67+Voyager, NexStar 6SE, C5+Mizar K, WO ZS80FD+Kenko NES, Megrez 72FD+Kenko KDS, Mini Borg 50, PST
Posted 21 October 2013 - 03:30 AM
Posted 21 October 2013 - 09:57 AM
The adapter plate is now available from Vixen and others to enable the Porta to be used on a standard photo tripod with 3/8” screw thread.
Posted 21 October 2013 - 03:06 PM
Tomorrow morning I'll have my Porta.
Posted 21 October 2013 - 08:56 PM
PortaMount to 3/8" mount.
The problem is that the Vixen #3942 plate has a 1/4" hole, and other than drilling and tapping out a 3/8" hole yourself, I end up using the Manfrotto 120 as pictured.
Posted 22 October 2013 - 02:29 PM
Posted 23 October 2013 - 09:33 AM
Posted 25 October 2013 - 11:05 AM