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Well Andrew there appear to be a few issues there. When you say a Bintel Astrgraph exactly which one ? It's not unusual for an astrograph config to fail to achieve ep focus unless an extension tube is used. Did you try the ep with an extension tube. It is pretty much impossible to focus a dslr without either Liveview or BYEOS conected to the camera. How is it setup. I assume you are not using a guidescope and guide camera at this stage. Short exposures can be done if your alignment is close. How did you setup the mount? More info is needed to help sort it out but iit can be done. Btw if the mount is shuddering it is likely binding, has this mount worked for you in the past?
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