brenden_wilson

<p>UPDATE: I got the extension tube off today. Sorry for the lateness, I was out all week. There is a wedge like lever just on the inside - that the release switch on the outside is supposed to push, triggering a mechanism that removes a locking pin attached to the lens bayonet mount. For some reason, and without seeing a working tube I don't know what that reason is, this wedge isn't being pushed. I believe it may have a bent piece on it.<br /> I had to poke my way around the mechanism until I found the point where I could manually push the locking pin out and then twist the tube off. I don't believe this problem is related to the usual "bronica lock-up", but I'm still not sure what caused it. Remember to follow the instructions on attaching and removing these things to a tee!</p>

<p>Thank you for your help dave, and david.</p>

<p>Damn, that was one of the first things I tried. It loosens up all the pins inside, but the tube and lens are still clamped together good, and the lever doesn't budge. The lube and tension are good, everything can be put back quite easily (the tube was barely used). Another thing I had tried was to simply take apart the tube from the back (pretty easy to do, and easy to put back), but you can only get so far from the one side. I'll bring it into work tomorrow and try and dismantle it again. I need the lens, the tube is expendable.</p>

<p>Okay, I'm attaching a little diagram I've done up. On the camera body, moving the release lever for the lens moves two things. 1, a chrome pin that was locked in to lens' chrome mount and 2, a black mechanism that I don't fully know the purpose of. There appears to be a very similar mechanism inside the extension tube, and was seen in the first photo. I also think there must be some kind of locking pin like on the body, and this is was must be released (seeing as you can tinker with the mechanism all you like, it makes no difference).</p>

<p>I'm afraid I really don't know what exactly the release lever on the extender 'should' do, as I never really paid close attention for the brief period it worked.</p>

<p>No luck yet. I'm beginning to think this isn't just the "bronica lockup". I'm trying to find a good photo of the tube from the side that attaches to the lens (the side I can't see on mine) to try and understand how the whole thing works and try and detach it all.</p>

<p>I'll attach a photo of what I have.</p>

 

<p>Hello, <br>

I know this question has been asked a few times in the past, though I've never read a really clear answer. Here it goes: I was using a newly acquired SQ-AI, with the 80mm lens mounted to the S-18 tube, mounted to the camera. Worked fine, except that now the release lever on the extension tube will not 'release' the lens. Both seem to be cocked fine, works fine when on the body - but will not release. I've actually taken the tube apart (as far as you can from only the backside), but have not found any magic way of releasing it.</p>

<p><strong>Solutions I've heard of:</strong></p>

<ul>

<li>- push the cocking pins a little further forward against the tension so they rest directly under the green dot --[didn't work, made no difference to the release lever]</li>

<li>- try and find the release latch from the inside --[this I don't quite understand, what does said latch look like?]</li>

</ul>

<p>Please, if you've got any clue let me know how to get this damn thing off! </p>

<p>-Brenden Wilson</p>