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OP
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Came at 4:30 today, had a "rattle" sound. Opened it up and found:
Small "roller" and circlip fell out on shaking it breech down after removing the mounting collar.
"We must go farther!"
Disassembled down to the manual focus ring, one roller missing from its post.
reinstalled and reassembled, AF works, manual as well. Aperture fine, glass clean and clear.
Will check it more closely in the daylight tomorrow. Couldn't tell if the VR was working.
So far, looks like Mitsy has a 70~300mm ∱4.5~5.6G ED VR lens to play with.
Small "roller" and circlip fell out on shaking it breech down after removing the mounting collar.
"We must go farther!"
Disassembled down to the manual focus ring, one roller missing from its post.
reinstalled and reassembled, AF works, manual as well. Aperture fine, glass clean and clear.
Will check it more closely in the daylight tomorrow. Couldn't tell if the VR was working.
So far, looks like Mitsy has a 70~300mm ∱4.5~5.6G ED VR lens to play with.
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Looks like the VR is doing it's thing.
OP
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Thanks. I started doing stuff like that as a pre-teen with watches and camera shutters, before I knew any better. Had a part-time job in my mid and late teens in a camera store, did repairs periodically on Copal shutters, oily apertures, stuff like that. Got a TLR Mamiya C220 handed to me by the owner of the newspaper where I was a "stringer" at the time, with a broken, missing winding crank. The camera had been dropped and caved in the side to jam the advance mechanism, and the shutter in the 65mm lens was jammed as well. Fixed the shutter, made a crank from a piece of 3/16" stainless stock, gently hammered the side plate into shape and had a working 2-1/4" square format camera a few days later. The B&W studio photo of the girl in the fiberglass chair was taken with that camera. By that time I'd "found" an 80mm normal F.L. lens for it.
This 70~300 is more computer than optic! Two P.C. boards layered in it, multi-conductor thin plastic ribbons connecting the electronics, "smooth wave" ultrasonic focus motor... very complex compared to what I'm used to. I got lucky!
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Even more impressive on the VR then - camera movement impact gets more pronounced as you go out in focal length.
OP
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That was my reasoning with shooting at such a low shutter speed. I'm fair at hand-held shooting but thought at anything above about 1/100th-sec. the VR would've probably been less apparent. From what's been "written" about the VR of this lens, as much as a four-stop compensation is likely. Seems from those three shots it's true.
There were a couple "candidates" on E-Bay, same lens. This one looked unsullied in the photos and description was comprehensive. The other had signs of buggery on a couple of the screw heads holding the mount, as if someone had attempted to open it up with the wrong tool. Seems those rollers in this model are prone to coming off their post, seen a couple others with: "does not focus, rattles when shaken" in descriptions as well. If either of the ones we have here experiences the same failure, I've a plan for a proper permanent fix. Time will tell.
OP
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Wondered if they were successful at getting further into the thing and if so, what 'secondary' damage was done as a result. Passed on it.
OP
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No need for MG parts, fifty years collecting those. Plenty of Alfa and Lotus stuff too. But doing some lens repair to turn 'em over so's to move into better, more current camera gear has appeal.
Right now, that repaired 70~300 is Herself's upgrade from a 55~200. May sell that one to offset the price of the replacement. She's already got 'er hooks into the longer one, so it's 'off th' market'...
I'd lose digits trying to take it from her bag.
