I want to make an upgrade in the next half year or so and for some time am reading opinions in the net, however can't get clear direction and will be very thankful to hear your opinions
Here is the background. I'm pure imager (once or twice per year am making short visual walkthrough for friends that has no experience at all). The setup which am building is permanent located in a small obsy - a 2.2m Uniwesal dome (don't mess with them unless you like big troubles). The mount is CEM60 and my primary camera is QHY22 with set of Astrodon filters - 3nm narrowband and LRGB. For many years am a refractor guy In a parallel world where money are not a factor would like something like 180mm of that kind and bigger dome, but I am here and now... It is not possible to house/afford something bigger than 150mm which is not significant step over the 130mm I have... So am looking for alternatives
There are two options that tear me apart and still can't find stable direction:
1. GSO clone RC 10" f/8 truss tube, detached focuser, with reducer that will make it ~ f/5.4
2. Meade ACF 10 f/8, possibly additional focuser, with reducer that will make it ~f/5.4
Both will be used with OAG. The collimation should not be a big issue - it is permeant setup and in worst case will require tuning once-twice per year... Am I right?
My research started and continues with real images hunt in Astrobin (in addition to reading everything that can find in the forums). There are some spectacular images taken with both scopes!
My considerations so far are:
The RC pros with truss version - the cooling will be faster because the open design and fans, the temperature shift should be smaller. The cons are bit bigger stars, spikes.
The ACF pros are the smaller obstruction, bit smaller stars and no spikes. The cons are slower cooling, bigger temperature shift, mirror flips ??? May need additional focuser, bit bigger price.
In long term I want to use the scope for astrophotography for smaller targets. In very long term if one day I find myself tired of astrophotography am thinking for supernovas search or variable stars photometry...
As I started will be very thankful to hear your opinions for those two models, for the links that I have missed, as well as the points and considerations I don't see or know
P.S. I have excluded the RASA models because are not compatible with the filters I have and because they require manual filter change. Fast Newtonians are excluded because are also too fast for Astrodon and because it is hard to put Corrector + OAG + Filter wheel.