|
when the scope is pointing up 45 deg +...gravity is coming into play with the weight of the primary mirror. Wind the focuser knob clockwise, the mirror is moving down towards the EP end of the scope & the knob is very easy to turn. Wind it the other direction, its fairly firm to move. This is because your fighting against gravity. When focussing, I get it to focus as viewed on the laptop, then I wind clockwise slightly, taking it out of focus, I then tweak it very slowly back the other way until I gain critical focus. This takes all backlash out of the system & will not shift on you while your imaging.
|