Olympus-OM
[Top] [All Lists]

Re: [OM] Extension rings magnification tables (long)

Subject: Re: [OM] Extension rings magnification tables (long)
From: WKato@xxxxxxx
Date: Wed, 16 Jun 1999 12:03:57 EDT
In a message dated 99-06-16 08:12:35 EDT, you write:

> Tubes:          Frame:
>  -------------------------------
>  7             : 0,14x <-> 0,18x
>  14            : 0,28x <-> 0,35x
>  7 + 14        : 0,42x <-> 0,53x
>  25            : 0,50x <-> 0,63x
>  7 + 25        : 0,64x <-> 0,80x
>  14 + 25       : 0,78x <-> 0,98x
>  7 + 14 + 25   : 0,92x <-> 1,15x 
>  
>  Hmmmm, I just checked these numbers against the table that appears on Hans'
>  e-sif page and it turns out that the left side numbers (i.e. focused at
>  "infinity") are pretty accurate, but the min. distance focusing numbers are
>  quite off.

The Olympus charts assume that you are using the approximate 7mm of extension 
available in the focusing mounts of each Zuiko lens in the 50mm range. So if 
you factor in another 7mm of extension into your figures everything should 
agree.

Warren

< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >


<Prev in Thread] Current Thread [Next in Thread>
Sponsored by Tako
Impressum | Datenschutz