New article: guillotine shutters

[QT Luong]

A new article by Bill Kumpf on a DIY guillotine shutter has been posted. It is composed of two parts:
Constructing a simple shutter
and
Determining shutter speeds

Comments are welcome in this thread.

[GPS]

Here we go once again...
Not commenting on the unusually thick guillotine blade and the choice of its material one thing should be said - this kind of shutter condemns your camera to horizontal positions mostly. As soon as you tilt it you start to get different results. Sometimes less, sometimes more, sometime off in an unacceptable way, etc.

[Richard Rankin]

Even given the limitations, I think an availability of these would help many people make the leap to trying barrel lenses. The guillotine shutter is easy to understand and this one attaches with rubber bands. Mounting packards on lens boards can be intimidating and a hassle and expensive if you have to buy the packard shutter.

If I had any woodworking skills at all, I'd make some of these and loan them out to people. I suspect many people out there would love to be trying old brass barrel lenses, etc, and just don't know where or how to start with it.

[GPS]

...

If I had any woodworking skills at all, I'd make some of these and loan them out to people. I suspect many people out there would love to be trying old brass barrel lenses, etc, and just don't know where or how to start with it.

Richard, you don't need any woodworking skills at all. You can make the thing out of PVC sheets with many advantages over wood (better slipping, no dimensional changes when wet, easier manufacturing etc.)
But to loan them you would need a lot of different diameters to satisfy your customers' different lenses...

[GPS]

And if you wanted to make a De luxe version you could put a small drop of oil between the blades to make it slip with less friction even in more inclined positions. Olive oil (extra virgin) would do...;-)

[Lee Hamiel]

And if you wanted to make a De luxe version you could put a small drop of oil between the blades to make it slip with less friction even in more inclined positions. Olive oil (extra virgin) would do...;-)

Delrin yes - olive oil no

[GPS]

Delrin yes - olive oil no

Red herrings yes - Red Socks no.

[BetterSense]

I would use plastic, preferably UHMW polyethylene, or cutting-board material. It is very slippery.

[GPS]

I would use plastic, preferably UHMW polyethylene, or cutting-board material. It is very slippery.

I gather that this material is not good for filing and as Richard doesn't have woodworking skills (even less machinery for that?) it could be more difficult for him to work with...? Slippery it is, indeed.

[Hugo Zhang]

Ron had this posting last year and I ordered one for my 5 1/2" wide Xenotar lens and it works well. It has a 4" Lees filter slot to put a ND or whatever filter you fancy.

http://www.largeformatphotography.in...ad.php?t=51309