Skywatcher Collimation tool - How to Guides?

[leinad (Dan)]

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?

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

[erick (Eric)]

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/ar...article_id=532

[leinad (Dan)]

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

[erick (Eric)]

Originally Posted by leinad

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

Yes, that's right.

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

How come no instructions? Second-hand?

[leinad (Dan)]

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 (Dan)]

Im not to sure why no instruction were included(possibly second hand ). 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.)

Originally Posted by erick

Yes, that's right.

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

How come no instructions? Second-hand?

[leinad (Dan)]

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 (Ian)]

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 (Dan)]

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 (Dan)]

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

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/s...ad.php?t=28735

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