SCT Collimation - first time

[Gregger]

Well that went well, not

Did a basic collimation from the front in daylight

Trued the de focussed method on Sirius

Hmm, harder than it looks

Now all I have in the defocussed image is a D rather than a circle

Back to the drawing boar

[Freddie]

Stick with it. A bit of practice and you'll be fine.

[barkis]

Hi. Gregger.

It's surprising how little adjustments of the secondary mirror, can produce large movement in the collimating process.

I never look down the tube to assess the collimation, I go straight to adjusting using a defocused star.

Have you got Bobs Knobs fitted. They do make it easier .

Ron

[Gregger]

Fitted the Bobs Knobs, hence the effort at collimation

I read somewhere that daytime rough collimation looking down the SCT from 12 feet or so was a good start. It produced a fair Jupiter image but then all down hill!

[rowan46]

this might help it worked for my 5 inch http://www.astrovox.gr/forum/downloa...45f3d3254b6ff9