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Old 12-12-2006, 08:28 PM
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g__day (Matthew)
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Join Date: Dec 2005
Location: Sydney
Posts: 2,898
Getting a Megrez 80 mm into focus with a Medae DSI

Guys I'm challenged and a bit stumped by this. I have a Meg that focuses using a 22mm eyepiece with the barrel extended only 1~2 mm from the start of the OTA tube.

When I switch to a Meade DSI to try astrophotography or auto-guiding I can't bring anything into focus, the rack and pinnion focuser would want to move the tube back into itself about 4~5 mm past its most retracted position.

Any ideas of what I can do to get past this? Should I try removing the 2" diagonal and extending the tube further to make up for the difference in light path length?
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