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Mike
With all my refractors, to focus close for terrestrial objects using a DSLR, I have to add extension tubes.
To focus at infinity, I remove the extension tubes thus moving the DSLR inwards, so you need to move the ToUcam inwards.
This is the same with my Mewlon and C9.25. To focus at infinity, the Primary/Secondary spacing is at a minimum and to focus on terrestrial objects, I have to increase the Primary/Secondary spacing using the focus knob.
Cheers
Dennis
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