Screw head protruding from back of shutter

mark · Jun 3, 2008

I bought a 90mm 1.8 fujinon SW in a seiko 0 shutter from an APUG member. No problem with the lens just this weird anomaly that is causing me some greif. There is a screw head protruding from the back of the shutter that will not screw in any further. It prevents the shutter from sitting flush with the lens board.

For those with this type of shutter it is directly below the V X M switch. Wish I could get a pic of it but my digital is in another town. It is definately not holding anything down so I do not know why it would be there. Can I just get rid of it?

Ole · Jun 3, 2008

That's the screw that's included with all new shutters. It either needs a notch in the lens board - in which case it prevents the shutter from rotating - or to be removed entirely. Unfortunately they have a nasty habit of being just about impossible to unscrew!

mark · Jun 3, 2008

It is easy to come out. Can I just ditch it?

John Kasaian · Jun 3, 2008

mark · Jun 3, 2008

Cool. I finally get to use my 90. Got the sinar bag bellows today.

Kent10D · Jun 3, 2008

mark said:
It is easy to come out. Can I just ditch it?

Don't ditch it!

Keep it taped to the inside of the box the lens came in, or somewhere safe. You never know when you might want to use that lens with a keyed lens board ... or resell the lens.

Laurent · Jun 3, 2008

I'd like to add one on some of my lenses. Would somebody be able to tell me which size is this screw ?

mjs · Jun 3, 2008

Take the lens to your local hardware store. Ask clerk to help you find the proper screw. It'll probably cost you all of three cents (US). Darned inflation!

Mike

Laurent said:
I'd like to add one on some of my lenses. Would somebody be able to tell me which size is this screw ?

Kent10D · Jun 3, 2008

mjs said:
Take the lens to your local hardware store. Ask clerk to help you find the proper screw. It'll probably cost you all of three cents (US). Darned inflation!

It's a special screw with a non-standard head.

Good luck with that.

John Kasaian · Jun 4, 2008

Maybe you could take it to a gun smith or watch repairman?

Laurent · Jun 4, 2008

I have a good address in France for small hardware (sub-millimeter screws, different materials), but I'd need to figure out which size it is.

mark · Jun 4, 2008

Lens mounted and ready to play with.

That little screw is a real booger. Super tiny. I dropped it and spent 15 minutes looking for it.

DWThomas · Jun 4, 2008

A hobby shop specializing in scale model railroad gear might be a better source of small screws than regular hardware stores. The latter tend to think #4 screws are small.

DaveT

ic-racer · Jun 5, 2008

Make sure the threads don't extend too far into the lens. The diaphragm elements of black Copal #1 shutters can be damaged by a 'too long' screw. On the Copal #1, you can see the diaphragm element move through the hole.

I had to fix one like this once: http://www.largeformatphotography.info/forum/showpost.php?p=279474&postcount=34

Barry S · Jun 5, 2008

Those anti-rotation screws don't look like any stock screw I've seen. I just pulled one off a Copal 3 and it's a slotted non-tapered pin with a short bit of threading at the end. I don't think I'd go substituting a random screw. Maybe MPEX or Badger keeps spares in stock.

keithwms · Jun 5, 2008

Mark, send your screw to Laurent!

mark · Jun 5, 2008

Sure

Send me your address Laurent

Laurent · Jun 7, 2008

If you do not need it, and if France is not too far away from you!
I'll send you a PM.

Many thanks to Keith for the idea and Mark for the offer !

Screw head protruding from back of shutter

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