Posts Made By: Max MIROT

I had loose secondary mirror so had remove the corrector plate. I noticed that the baffel doen't not line up with the corrector plate secondary hole when looking though the baffel. This is not a shim issue. It about 1/4 offset! Any suggestions? Is there a way to square up tube or the baffel?

I am not sure how this happened it's not from removing the corrector plate.

Also, I found the index marks on back of the secondary. it suppose to line up with the primary mirror. I have located both. I noticed a V mark inside secondary perforation. It does not line up with primary or outer corrector plate index marks. What does this mark for if anything?

Max

I fixed the problem!

This is a big lapse in Celestron quality control!

The tube was miss drilled on two screws that connect it to the back plate casting.

This cocked the tube assembly about 10 degrees.

Not good.

If found that once I lossend back plate screws the tube slide nicely into the casting which has lip which tube seats in. Two screws lined up with the drilled holes two did not.

More importantly the baffle now lined up perfectly with corrector plate. No more cresent of glass visible like a 6 day old moon in focuser. It drill two new hole in the tube and it was fixed.

The scope collimated properly and the oval center hole is now round. And images show the difference.

Max

My original post is bellow

"I had loose secondary mirror so had remove the corrector plate. I noticed that the baffel doen't not line up with the corrector plate secondary hole when looking though the baffel. This is not a shim issue. It about 1/4 offset! Any suggestions? Is there a way to square up tube or the baffel?

I am not sure how this happened it's not from removing the corrector plate.

Also, I found the index marks on back of the secondary. it suppose to line up with the primary mirror. I have located both. I noticed a V mark inside secondary perforation. It does not line up with primary or outer corrector plate index marks. What does this mark for if anything?

Max "

I wondered if anyone has info on the johnsonian GOTO Dobs. It is similar to the pop up scope but much more but is quite different in design features. I saw one at WSP 2006 on the last day of the star party. It felt nice but did get use it.

Max