Thanks guys yes I was not prepared for all the changes just changing from the 1600mm to the 2600mm. The 11.5 mm of extra back focus plus the change in filter wheel thickness meant I had to remove my sx active optics unit also move the oag to a new position infront of the coma corrector. Also moved the tube assembly from a home made gem to a eq8 mount.No one can say astrophotgraphy isn't a challange.lol.
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