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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