Cheap manual extension tubes, I have a problem

Started Jun 27, 2012 | Discussions thread
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Trevor Carpenter
Trevor Carpenter Forum Pro • Posts: 12,759
Cheap manual extension tubes, I have a problem

I bought a set of cheap manual extensions tubes see link

http://www.ebay.co.uk/itm/ws/eBayISAPI.dll?ViewItem&item=260805298069&ssPageName=ADME:L:OC:GB:3160

Trying them out I put them between my 14-42 and the camera no problem but now I can't get the ring to release from the lens. There is a small silver knob which I assume must have something to do with the removal but I can't see what I have to do to it

Does anybody have any experience of these

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Panasonic Lumix DMC-GX7 Panasonic Lumix DMC-G7 Panasonic Lumix G Vario 100-300mm F4-5.6 OIS Olympus M.Zuiko Digital ED 60mm 1:2.8 Macro Panasonic Lumix G Vario 14-140mm F3.5-5.6 ASPH. / Power O.I.S
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