This benefit has a small number of drawbacks. The Telrad finder if set at one position, is off by as much as a degree when moved to a second position, although this problem can be mitigated by the use of a shim . Another wonderful aspect to this scope is it's Galaxy mirror. The mirror weighs about 50 lbs, and it is mounted in such a way that it can be removed from the scope in about 5 minutes. The mirror provides superior views using the 20, and 35 mm Nagler eyepieces, but also provides wonderful views through the 13 mm and 9.8 mm naglers, and even the 4.8mm eyepiece.
Polar alignment is performed using the azamuth bar .
The 18 inch scope and suburban GRB imaging. Go Here For other images, click here .