Issue regarding focus of Nexstar 6SE

[Srinivasan]

 

Hi,

 

I am using Celestron Nexstar 6SE since last  2 years and for the first time I am facing issue regarding image formation on the eyepiece. 

 

Since last week every thing was fine. The images were very clear. Today when I installed my telescope to see the moon, there was no image formation of moon through the eye piece. There was bright light. Tried adjusting the focus through the knob but it did not work. 

I took out eye piece and checked directly through the star diagnol. The image was clearly visible through the star diagnol. So I tried checking different eye pieces. But in all the eye piece the problem was same. 

 

Kindly suggest as what to do.

 

Thanks and Regards

V.Srinivasan

 

[Ruud]

You probably tried the entire range of the focusing knob. Maybe the mirror came loose from its focusing mechanism.

 

 

 

Edited March 1, 2020 by Ruud

[Louis D]

Does the size of the out of focus blob of an object change when you spin the focus knob?  If not, @Ruud is probably right, the primary mirror has detached from the focusing mechanism.  If that's the case, you've got some scope surgery on your hands.