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Old 12-03-2018, 10:23 AM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,927
Back spacing....
The distance from the front of the T2 attachment camera adaptor to the focal plane of the camera (where the image is located) is 55mm.
You need to allow for this distance when focusing....

The eyepiece when focused is at the focal plane, the front of the T2 ring will need to be 55mm further inside focus.
Hope this helps.
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