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[OM] Re: Auto Tubes

Subject: [OM] Re: Auto Tubes
From: "John A. Lind" <jlind@xxxxxxxxxxxx>
Date: Wed, 17 Nov 2004 16:31:37 -0500
At 03:55 PM 11/17/04, Bob Gries wrote:

>They are OM mount, so if you are using an OM lens with the adapter,
>then yes.  otherwise you have to buy the ext. tubes for the E-mount.

In the E-mount, make that singular . . . there's only one, the EXT-25, and 
it's a very surprisingly long tube . . . 25mm . . . which is the longest of 
the three OM tubes for 35mm format.  "Street price" for it is about 
$130.  That's as surprisingly high as the tube is long considering how 
incredibly simple it is to make the exceptionally high precision optics 
required for extension tubes, particularly the light transmission which is 
effectively (for all practical purposes) 100%.

-- John Lind


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