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Re: [OM] Auto Extension Tube Question

Subject: Re: [OM] Auto Extension Tube Question
From: "John A. Lind" <jlind@xxxxxxxxxxx>
Date: Sat, 31 Mar 2001 02:15:26 +0000
At 05:29 3/31/01, Michael Versinger wondered if this was normal:
I just received a 7 and 14mm Olympus extension tube and I have a quick
question. While the 14mm has a spring that returns the lever that closes
down the aperture, the 7mm does not. Both seem to work properly and do
operate the aperture mechanism when the shutter fires. I was wondering if
there is a problem with the 7mm not having a spring return. Is this normal?

I have a 7mm Oly Auto Tube. No spring return. Also have the Vivitar AT-21 set of three auto tubes in OM mount (12/20/36mm). The AT-21's shortest tube, the 12mm, doesn't have any spring returns either. I've always presumed that the shortness of these two tubes either prevented designing a spring return in them, or made one unnecessary. Both work just fine; been using them for some time.

-- John


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