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By Anthony RS
Is anyone here using the TS Photon 6" F4 newtonian? I'm about to purchase it but I have some doubts and questions:
1- Does it hold collimation well, at least in a single session?
2- Is it impossible to balance in DEC due to its small dovetail or is it possible but harder?
3- Is the focuser rigid enough or does it introduce tilt?
4- Will collimating it be a nightmare?
5- I'm really picky when it comes to coma, should I expect some coma on edges even while using the Skywatcher Aplanatic F4 CC?
6- All in all, do you advice me to buy it or have some other option in the same price range.
I am trying to plan out my longer term equipment strategy, rather than go for impulse purchases and would like some advice on dual mounting scopes.
At present I have a roll-off shed with steel pier in concrete block. The mount is an HEQ5-Pro, stellar tuned and belt driven which is supposed to have an astrophotography payload of around 11Kg. My main camera is an ASI294MC. Guide camera Lodestar x2.
I switch between two scope set ups. (Weight for both includes cameras and filter draw.)
• ES102 with 50mm guide scope, FL=714, weight is 7.5 Kg
• C8 (not edge) with 6.3 FR and OAG, FL = 1260, Weight is 8kg
So clearly I cannot mount both on my HEQ5 Pro.
One of the reasons for going with a fixed pier in a shed is that once set up and aligned, I can just push back the roof, align, focus and get imaging in 5 mins. However as targets change I need to swap scopes, rebalance, rewire etc. Not a massive effort but I am wondering if I could dual these scopes and perhaps eventually add something like a WO GT71 FL= 420, weight 2.93 for the wide stuff. So total weight around 19kg. Then maybe in the future go for a Mono camera and filter wheel and even perhaps an C9.25 Edge pushing the weight to around 23kg.
To do this I would plan to buy a CEM 60 mount that claims a payload of 27.2 kg, although it is not clear if this is imaging, although I can’t see why anyone would buy one just for visual. I would then just guide with the OAG.
So I have two questions:
Is this a realistic strategy or would I loose guiding accuracy by loading the mount in this way. Perhaps even compared to keeping the HEQ5-Pro and swapping when necessary. Or maybe just forget the GT71 and C9.25
If I do go down this route, what is the best way of dual or triple mounting? I have read that mounting two dissimilar scopes side by side risks unbalancing the setup, but also that mounting the ES102 on ADM rings risks flexure.
Any other advice or observations most welcome.
How does the TS Optics ep compare with Vixen LVW 22mm? Former plentiful, latter hens teeth. TS has AFOV 70 deg and 20mm eye relief, also ED.
I like it's camera body connection possibility with a HypT2 connector (removable eye cup), but use would be visual mainly.
Following on from my lunar shots just using just the x30 zoom on my Panasonic camera, I thought I ought to try it on a scope! These were very quickly taken in about 15 mins using my Vixen f9 Fluorite on the Giro-WR mount. It was all a little random in terms of targeting, will be much better when I pop the same combination onto the Vixen GP.
Focusing leaves a fair amount to be desired, I need to play around with different methods when I have more time, and using the 10 second timer made it hard to just when targets were going to be in view.
Anyway, I think these might be better if I try with the 40mm TMB Paragon eyepiece, but that involves using a 2" diagonal which I could not be bothered to do at the time!
So, much room for improvement, particularly on focus, although there is a pleasing lack of CA in the images.
No comments about orientation please