Re: [ATM] ebay HUGE telescope lens calculations

[Ken Hunter <atm_ken_hunter@yahoo.com>]

Stick it in front of a flat and do a RONCHI and
Focault test on it then put it outside and look at
some stars to see how it works with your eyepieces.

Be prepared to regrind and polish if the focus
distance is anything close to what the seller quoted.

Ken Hunter


--- rory123@bellsouth.net wrote:

> Hi:
> Bought this lens on ebay...Have an idea of what it
> can be used for...but don't want to wait until it
> gets here ...to measure it exactly.   
> 
>
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3850364518&ssPageName=ADME:B:BN:US:1
> 
> Anyone know how get a closer estimate of lens
> characteristics?
> 
> Thanks,
> Rory Blake
> Charlotte, NC
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
> 



		
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