[refractordude]

Hello there


It is the Celestron 150nn F8 achromatic. I did a front/back focus star test and got a complete circle, but only one outer inside ring. I notice when I turn the focuser forward it will go back a very little on it's own. I was bringing objects to focus by just turning the focuser backwards to get a sharp focus. Yes the telescope, diagonal, and eyepieces were all acclimated to the outside temperature.


I can bring stars close to focus. Thanks all