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08-11-2013, 06:14 AM   #1
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Owners: Vivitar AT-22 macro extension tubes

Can somebody verify something for me? The smallest tube (12mm) seems different from the others in the way that the aperture linkage works. On mine, just that one isn't spring loaded and also seems to have trouble mating properly if I connect the lens to it and it to the others. If I put the 12mm tube first (camera side) in the stack, it works fine. It's also fine if I use it by itself.

Since manuals are impossible to find for these things, I thought I'd ask if someone might compare theirs to mine. I just want to know if this is normal. I'm thinking of getting rid of the set, but don't want to advertise it as perfect if it isn't.

Much appreciated!

Edit: It does not work fine by itself.


Last edited by QuixoticTonic; 08-11-2013 at 09:31 AM.
08-11-2013, 08:28 AM   #2
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The owner's manual is available here:

Page 75

but it won't help you as there are no photos or illustrations other than close-up data, exposure compensation and DOF charts.

However Page 2 states:

QuoteQuote:
MOUNTING
Vivitar Extension Tubes are mounted on the camera in the same way your camera lens is mounted. To ensure proper meter and diaphragm coupling to your camera it is important that you you first mount the Extension Tube(s) on your camera the same way you would mount your lens. With the Extension Tube(s) securely in place, mount your lens on the Tube in the same way you would mount your lens to the camera. After shooting, the Extension Tube(s) can be removed from the camera in any order.

Last edited by Not a Number; 08-11-2013 at 08:35 AM.
08-11-2013, 09:19 AM   #3
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That's typical of extension tubes. The bigger ones are spring-loaded just because they need to be because of the extra distance and greater weight of moving parts. The smaller one relies on the strength of the camera mechanism itself since it isn't adding much stress. So if it works with the small one always put on first, then just keep doing that.
08-11-2013, 09:44 AM   #4
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QuoteOriginally posted by vonBaloney Quote
That's typical of extension tubes. The bigger ones are spring-loaded just because they need to be because of the extra distance and greater weight of moving parts. The smaller one relies on the strength of the camera mechanism itself since it isn't adding much stress. So if it works with the small one always put on first, then just keep doing that.
That's good to know. Thank you both!

08-11-2013, 09:45 AM   #5
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QuoteOriginally posted by Not a Number Quote
The owner's manual is available here:

Page 75

but it won't help you as there are no photos or illustrations other than close-up data, exposure compensation and DOF charts.

However Page 2 states:
Thanks for the link to the manual! I searched a long time with no luck.

It was helpful. I was mounting in the wrong order all along.
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