Re: ATM Eyepiece focal-plane position measurement.

["Gary Seronik" <gseronik@direct.ca>]

Mel:

Wouldn't your +/- values depend upon the f-ratio of the scope?  Or am I
missing something here all together...

Regards,
Gary in Vancouver

----------
> From: Mel Bartels <mbartels@efn.org>
> To: Lynne or Larry Manuel <lmanuel@agt.net>
> Cc: atm@shore.net
> Subject: Re: ATM Eyepiece focal-plane position measurement.
> Date: Wednesday, October 23, 1996 1:49 PM
> 
> eyepiece        mm      +- focus
> --------------------------------
> T. PanOptic   35      0
> T. Wide Field 32      0
> T. Wide Field 24      0
> T. Nagler     20      0
> M. Plossl     20      0
> T. Nagler     13      0
> M. Plossl     12.4    0
> M. MA (guide) 12      -0.6"
> T. Nagler     9       +0.5" 
> M. Plossl     6.4     0
> M. Ultra Wide 4.7     0
> 
> 
> -- 
> With Regards, Mel Bartels    Programmer/Analyst, and amateur astronomer
> mailto: mbartels@efn.org     homepage: http://www.efn.org/~mbartels
> How To Computerize A Dob:
> http://zebu.uoregon.edu/~mbartels/altaz/altaz.html