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[OM] RE:

Subject: [OM] RE:
From: "Brian P. Huber" <bphuber@xxxxxxxxxx>
Date: Thu, 4 Jan 2001 11:49:09 -0500
Auto tubes stay open at all f/stops until you take photo or use DOF.
Manual tubes stop down lens as you change f/stops.  Darker image to focus
with, but less expensive.
Manuals were the first ones, auto came later.

Brian P. Huber


> What's the difference between manual and auto extension
> tubes, and what are
> the benefits ???
>
> Cheers, Hefin.


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