"The 2” focusers of the Messier Series from AR-102 or NT-130 on have a
built in extension tube. Depending on the accessories used, or when using
a camera, it might not be possible to reach the focus. Focus travel to the
inside might not be sufficient in the standard configuration. To reach focus,
unscrew the eyepiece holder, then the following 25mm extension tube.
Screw the eyepiece holder back in place."
Return to Ask a silly (astronomy) question
Users browsing this forum: No registered users and 0 guests