Quote:
Originally Posted by John K
Have double checked this.
In total, I have a total of 14 cm of total back focus which includes my main mirror moving up 1 cm. This is from where my eyepiece focuses to the inserted focuser.
If I add my current imaging train, I still have 2.5cm left (as I can move my main mirror up 1 cm), but I still need to add a filter wheel. But this includes a Lumicon Giant Easy guider which is not ultra thin, my Canon 400d, and my coma corrector.
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CM or MM John. If it is 140mm then that is ok. In your original post you said you had 15mm.
Personally if you could afford either a QSIWSG or SBIG with integrated filter wheel then you would be ok.