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Old 27-09-2009, 08:04 AM
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pmrid (Peter)
Ageing badly.

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Join Date: May 2008
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Quote:
Originally Posted by multiweb View Post
This is correct: 55mm +/-2mm is the recommended distance by the manufacturer. That may slightly vary depending on the scope/camera combinations you're using though but it's a good point to start from.
OK. That 55mm +/- 2mm from the CCD image plane to the outer edge of the T-RIng. So with a standard DSLR there is probably no need for the variable adapter you had made. It's use would be with CCD cams such as a QHY8 or Orion where the distance from the CCD chip to the ouser edge of the camera would only be 10-12 mm or so. The variable adapter would allow you to take that up to 55mm and THEN you screw in the MMPC. Have I got that right?
Peter
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