Skywatcher Collimation tool - How to Guides?

[leinad]

Hi guys.

I picked up a Skywatcher collimation tool today.
One of the pins looks slightly bent, but the cross looks centered. I cant find any guides relating to how to use this thing? :screwy:

Can anyone provide any links or instruction on how I should use this.

Ive attached some pics with the post to show its construction.
Thanks :sadeyes:

[erick]

Much the same as the Orion tool, I would expect.

Cannot find the instructions on the net, but here is a review with some guidance:-

http://www.astromart.com/articles/article.asp?article_id=532

[leinad]

I gather although the reflective collimator on the eyepiece shines light in, the front cover of the dob should be removed?

[erick]

Yes, that's right.

Check the threads on Cheshire collimation tools for more guidance and tips.

How come no instructions? Second-hand?

[leinad]

I believe If got the collimation close; circles look quite closely aligned.
One question. Should I be ignoring the small doughnut circle on the pri mirror? As its off centre.

[leinad]

Im not to sure why no instruction were included(possibly second hand ).:mad2: Receipt says skywatcher collimation tool. Starting to slightly doubt the product. It certainly does look engineered brilliantly. even one of the pins (that makes the cross reticle is slightly bent.)

[leinad]

Heres a pic I took through the pin hole in collimation tool.(wasnt that easy).

Please comment, does this look close; and should I be ignoring the small doughnut circle on the pri. mirror?

Theres this guide: http://btow.com.au/pdf/tips/Collimation.pdf
But it doesn't show the small doughnut circle on the pri.

[stringscope]

Here you go. Bryan Greer has published some good instructions, pages 6-9 of the PDF.

http://www.fpi-protostar.com/ftp/instman16.pdf

No, the donut ring in the centre of the mirror is most important. I think I can see it bottom centre in your image. The donut needs to be centred in the crosshairs.

Cheers,

[leinad]

Thanks, I got the doughnut centred, but I fell the sec. mirror needs to be slightly turned clockways to line up thruogh the focuser. Im scared @#$$less to do this though.

[leinad]

Well I think I may be ok to go, from the below.:sadeyes::whistle:

Reading starkler's comment : Marko if the secondary is centred under the focuser as seen through the cheshire/sight tube, and the cross hairs are over the reflection of the primary centre spot, you're right to go.

From here: http://www.iceinspace.com.au/forum/showthread.php?t=28735

And seeing that scooters 2nd last pic here: http://www.iceinspace.com.au/forum/showthread.php?t=28735