[LargeFormat] Barrel lenses

[Guy Glorieux]

Thanks for the info, Les and Frank.

Guy

----- Original Message -----
From: "Les Newcomer" <lnphoto@twmi.rr.com>
To: <largeformat@f32.net>
Sent: Friday, March 15, 2002 4:22 PM
Subject: Re: [LargeFormat] Barrel lenses


> There are a couple of ways.
>
> The first is to use a Packard shutter.
>
> Packard shutters are usually mounted on the back of the lensboard or
> sometimes mounted inside the camera itself. These shutters have no set
> shutter speeds but most of the time one bulb and some black hose
connecting
> to it.
>
> When you squeeze the bulb you open the shutter, when you release you
close
> the shutter.
>
> A second model has a brass pin located near the top. When the pin is
pushed
> in, it allows the shutter to fire at an "instantaneous" speed,
someting
> around 1/15th of a second when the bulb is squeezed vigorously.
>
> In rare instances you can find a double hose model. These were used
almost
> exclusively on large studio cameras, one bulb had the instantaeneous
> exposure, the other a "bulb' exposure.
>
>
> The most common way a barrel lens was used in the early 20th century
was to
> employ the boler hat that was invariably on your head as a shutter.
Hang the
> hat on the lens, pull the dark slide move the hat away and back, thus
> exposing the plate.  The lens cap can be used the same way.  A  Third
and
> modern variation to this is the "country shutter" It's nothing more
than a
> small box, usually a 4x5 film box taped to the end of a stick, usually
a
> ruler. This allows a quicker exposure with a "flick of the wrist".
Also used
> when you want to do multiple pops of the flash.
>
> some alternatives are to buy a Thornton Picard shutter. This press
fits on
> the front of the lens, is a focal plane shutter with a variety of
times on
> it. Finding one in usable condition is difficult as the shutter
material is
> usually full of holes.
>
> The other is a Luc shutter. Hard to find but it too fits on the front
of the
> lens with threaded screws with rubber tips.  It's a bladed iris type
shutter
> that gives T B and I only.
>
>
> Lastly is to have the barrel lens front mounted to a shutter. In this
case
> the lens threads to a modern shutter that threads to the lensboard.
The
> disadvantage to this is the shutter usually needs to be fairly large
so it
> doesn't vignette the image.
>
> les
>
>
>
> > From: "Guy Glorieux" <guy.glorieux@sympatico.ca>
> > Reply-To: largeformat@f32.net
> > Date: Fri, 15 Mar 2002 15:12:15 -0500
> > To: "LargeFormat List" <largeformat@f32.net>
> > Subject: [LargeFormat] Barrel lenses
> >
> > Hi,
> >
> > I've been intrigued for quite some time now about how to use flanged
> > barrel lenses with a lens plate.  I've seen quite a lot for sale on
> > eBay, some old some newer, but I can't figure how one installs a
shutter
> > with the lens if the lens is to be mounted directly on the lens
plate?
> > What kind of shutter does one use with such lenses and where does it
fit
> > in the lens/shutter/lensplate set-up?
> >
> > Guy
> >
> >
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>
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