bellinghman: (Caricature)
In my last post, I noted that I managed to recover from a jammed mirror on the DSLR.

What I'd not done was to properly try out the lens after the drop. It appeared fine when I was giving it an initial check, so I assumed all was OK. But on Sunday we had family down from York, and it being a nice day we took them out on the Heath.

That is where I discovered that the 18-200 VR lens was refusing to focus properly at infinity when zoomed all the way open. It was fine at shorter ranges, and fine focusing to infinity when at the 18mm end of the range. But attempting to use the zoom to focus on something a good distance away?

Nope. Just a blur, with auto or manual.

Sigh.

This is the most expensive bit of photographic kit I've ever bought, and not being able to use it for longer ranges rather defeats the purpose.

Getting one of these repaired looks like a three figure sum — not as much as it cost, not as much as it would cost to replace, but still a fair sum. But then I discovered something on the 'net. This symptom can be caused by a loose front element. There's a ring that holds the front-most bit of glass in, and if that's loose and the glass has ridden forwards, it can't focus. But if you tighten the ring back in, it may work.

And yes, the front element ring was loose, and yes, I could turn it with my fingernails, and it took about a complete turn.

So I now have a properly-working-at-full-zoom-and-infinity lens again. For what it's worth, I don't think this was actually caused by the drop, as I think it was a bit blurry at full zoom before that, but the extra shake won't have helped.
bellinghman: (Caricature)
Actually, I didn't, but I did consider the option.

On Tuesday, we were on the way to the Distraction Club monthly show in the Phoenix on Cavendish Square. We had arrived at Oxford Circus tube, and were walking along the corridor toward the escalators when I suddenly felt the weight on my shoulder go, and heard a thunk on the ground behind me. I looked round to see my Nikon D5100 DSLR had slipped out of its case and fallen to the tiled floor.

Hoping it was all okay, I picked it up, put it back in the case and zipped the flap properly shut before we proceeded to the pub.

Once at the destination, I could check it over. And that's when I discovered that though all the electronics appeared to work and nothing appeared chipped or cracked, the shutter wouldn't work. And so, swearing silently, the only pictures I took were with my phone.

(The Nexus 6P does remarkably good work in a dimly-lit basement with moving targets, but it doesn't exactly have the same quality of picture)

Taking the lens off (a piece of equipment that had actually cost me more that the camera body when I originally bought it back in Kyoto in 2007), I looked inside the resulting aperture. The mirror wasn't moving properly when I pressed the shutter button. It quivered in place, but that was it.

Hello Google.

Well, it turns out that there are various possibilities, but one seemed to match what I could see. There's a plastic post that's supposed to stop the moving mirror from going too far when it springs forward and then back again, but the mirror had ridden up past it and was jammed on it. I stuck a jeweller's screwdriver in, wiggled a bit, and the mirror came loose. I pressed the shutter button, and everything was back to normal. Hooray and phew!
bellinghman: (Default)
The first photograph I like with my new (second-hand) camera.

Behind a cut, to avoid breaking friends pages )
bellinghman: (Default)
The first photograph I like with my new (second-hand) camera.

Behind a cut, to avoid breaking friends pages )

May 2016

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