Optical collimation

[gio500]

I have just got a new LX90 8inch GPS and i would like to know which three screws it means i have to ajust  for collimation of the telescope. Thank You.

                                                   Gio

[John S.]

Hi Gio,
The three screws are on the front face of the secondary mirror. I wouldn't touch them UNLESS the mirrors are definitely out of alignment. I just got a new LX90GPS three weeks ago and the collimation was perfect.

John

[wsuriano]

It's the inner 3 set of screws.  Consider Bob's Knobs.  They make the whole collimation thing a lot easier and safer.

[Tony]

The ones with the round pan heads in the flat plate?

[wsuriano]

I don't know what kind of heads you have, but as the previous poster said, it's the inner three.  You have a total of 6 screws, three along the outer edge and three closer to the center.  Its the latter 3 that are the collimation screws, the three closer to the center.  And, definitely Bob's Knobs.  They make the whole process a lot easier and safer.

[Tony]

Thanks, I found the outside ones didn't seem to move anything!

[donald]

HI,i just had to say something here.i don't know what's going on with meade but the problem i've had is misinformation.first it was with a LS6 i bought.some directions about the GPS on the hand controller were incorrect and after phone calls to meade i was told that that had changed and was no longer there.i was told that some things in the book were no longer correct(great).i sent it back and purchased( another) 8"LX90.i purchased bobs knobs and the pic shows the three screws on the inner plate but when i looked at my LX90 manual it shows the screws to the outer edge with arrows pointing to them.i went by bobs picture with the pic and the fact that the allenwrench they sent only fit the inner screws,i figure meade is wrong!!!!  how can that be when they 're the ones that made it?what's wrong with this picture,or should i say thier picture?     Don