[Moon-net] [Moon] Fw: Prime focus extention calculation

Koellner, Guenter (NSN - DE/Munich) guenter.koellner at nsn.com
Sat Nov 1 19:10:45 CET 2008


Hello Walter
 
I have once extended my original 3m dish (f/D=0.475) to 4.5m and f/D=0.32
 
But not using Excel, I used Acad...
 
73, Günter

________________________________

From: moon-bounces at moonbounce.info [mailto:moon-bounces at moonbounce.info] On Behalf Of ext Walter Crauwels ON4BCB
Sent: Saturday, November 01, 2008 2:52 PM
To: moon at moonbounce.info
Cc: moon-net at list-serv.davidv.net
Subject: [Moon] Fw: Prime focus extention calculation


 
----- Original Message ----- 
From: Walter Crauwels <mailto:Walter.crauwels at skynet.be>  
To: moon at moonbounce.info 
Cc: moon-net at list-serv.davidv.net 
Sent: Saturday, November 01, 2008 12:04 PM
Subject: Prime focus extention calculation

No this is not about extention of... 
Like we all ever received some spam mail !!! but:
 
I have an excisting prime focus F/D 0.4 which i would like to
extend to an F/D 0.35
In order not to reinvent "the wheel" ,I was wondering if someone has made an excell sheet to calculate the dimensions of the parabolic with respect to the
excisting dimensions for an F/D of 0.4
 
Walter
  
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