Fast and accurate collimation of Birger mount

[Lauri Kettunen]

Wrote an excel sheet that should be helpful in collimating the Birger mount.

This complements the instructions given in Jay's videos, and the idea is to throw away the pen, paper and calculator Jay employed. Moreover, this should convergence very fast to the correct setting. (In the video an ancient scheme to find the setting is explain.)

The collimation goes in two stages. In the first stage one needs to get two guesses somewhat close, and thereafter the table switches to use the secant method. Everything should be pretty self instructive and somewhat dummy protected. Just start to type data into the yellow boxes from top to down and the sheet will guide what to do.

As always no warranty or guarantee it will work for you, but let's see.

Here's an pdf-example of collimation of my mount

www.luontovideo.net/Birger-collimation-example.pdf

and this is the excel file

www.luontovideo.net/Birger-collimation.xls

NOTICE: In Excel the decimal separator must be a dot. Use Excel help with the keyword "decimal separator" to find out how to change it, if needed.

 

[Paolo Tinari]

hey Lauri,
it looks lke a nice tool. Looking forward to use it as soon as possible

 

[Martin Weiss]

Lauri et al, any chance you could re-upload the sheet/xls

Thanks!

 

[Lauri Kettunen]

Martin, could you please send me an email firstname.lastname_at_wildcine.fi, and I'll send you the files as a reply.

 

[Bill Bayley]

Hello Lauri or Martin, I'd like to make use of the collimation spreadsheet also. Please send files to bill_bayley@ncsu.edu Thanks.

 

[Eric Giovon]

Hi Lauri - if you'd be so kind to send me the files as well. My email is eric@ericgiovon.com Thanks.

 

[Thomas Balcom]

Lauri,

I've got a RED One MX with the Birger (a little outdated I know) but we need help collimating this mount (Jay's Videos are no longer available) Been having trouble finding good info.
Could you send this over to me in a PM?

Thanks!

Thomas