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Old 07-08-2014, 01:40 PM
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graham.hobart (Graham stevens)
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Join Date: Nov 2008
Location: hobart, tasmania
Posts: 2,241
Vixen R200SS back focus

I am considering this scope a nice fast f4 W.F newt.
I have some concerns about the available back focus and my imaging rig though.
The specs describe scope back focus as 72.5mm.
I have an SBIG STT8300 which is described as back focus 17.5mm
plus an FWG-8G filter wheel described as 54.06mm
and then an AO8-T described as 51.3mm back focus (=122.86 mm together)
Add into this mix a coma corrector and a Moonlite focuser upgrade and I have doubts it will all fit?
I am adding all the SBIG stuff together- is this correct?
If so I will not be able to fit it all in - is that so?

Is there any way around this?

Thanks for any help
Graham
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