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Old 20-04-2013, 08:10 AM
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Paul Haese
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Paul Haese is offline
 
Join Date: Jan 2009
Location: Adelaide
Posts: 9,937
Hi Graham,

I was thinking that the disk will not work. Mainly because it is supposed to extend the focal length by 1mm. I have used the disk on an SSAG before and they work a treat and you can achieve focus easily. What is the back focus distance of the lodestar? I would have thought it was the same as the SBIG ST-i which is 13.36mm. If you are 12mm-15mm then it should still focus. If it is outside of those parameters then it might be an issue. Best bet though is contact the Yahoo group for some help, or contact Kevin from QSI and ask him direct.
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