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Dec. 15th, 2005

Well, shite.

Prepping for second-unit shooting for Prey. Pulled my camera out to look at it and refamiliarize myself with it since it's been too damn long, and discovered that my lens is broken. Specifically, the backfocus adjustment ring is cracked.

For those of you who aren't familiar with removable lenses, a zoom lens has to maintain its focus throughout it's zoom range. Though I've never seen it for still cameras, every video and film camera that I've ever seen has a backfocus adjustment that is set whenever you replace the zoom lens on the camera (i.e. every time you put it back on). It's not a big deal, it takes five minutes. But with that adjustment ring broken, my lens no longer retains focus through its zoom range.

Getting a new lens is out of the question, since the lens alone would be almost as much as buying a new DVX-100A. So I have to try and fix the old lens.

The ring that is cracked is made of plastic, which is probably the reason that it broke in the first place. It's designed as a clamp with a pinscrew; loosen the screw, make the adjustment, tighten the screw to hold it in place. That puts a lot of stress on the ring, and was apparently enough to make it go.

To fix it... damn, I'm not sure. There is epoxy, which would probably work for a while, but it doesn't have good elongation strength characteristics and would probably break again. I might be able to use ty-raps, except for the pinscrew housing.

Damn, this one's tough.

Comments

( 3 comments — Leave a comment )
molasses
Dec. 15th, 2005 05:22 pm (UTC)
poked around...replacement ring??
found this here
http://www.offworld.com/dv500/troubleshooting.html

Someone has over tightened the tracking ring (aka "back focus adjustment") on the lens, and cracked it. If you look closely at the base of the lock down screw, you should see a small crack in the ring. The fastest way to get this fixed is to take it to your local Fujinon service center. A replacement tracking ring will run you about $80 plus tax if it is out of warranty.
magicmarmot
Dec. 15th, 2005 05:42 pm (UTC)
Re: poked around...replacement ring??
Cripes, that's exactly right. Nice poking. :)
avindair
Dec. 15th, 2005 05:29 pm (UTC)
That sucks. :(
( 3 comments — Leave a comment )

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