Re: Re: Slit-apertures ?

Hello All,

I made a 4x5 slit camera a few years ago. I made it out of illustration board
that can be purchased at a good art supply store. I made the slits out of the
same brass shim that I make pinholes in. The slits are spaced about 1 1/2 inches
apart, and then it is 4 inches to the film plane; for a total length of 5 1/2".
I used a Polaroid 545 back and experimented until I got a good result. I found
out that the camera was about f/180; and that's worked well ever since. I
haven't used it in years but just might go out and get some Polaroid film and
play.

"Keep on Pinholin'",
Tom

William Erickson wrote:

> Eric says that the "traditional' positioning of the two slits is two inches
> apart and the one nearest to the film two inches from the fil. The slits
> work well if about 1/50 inch in width. I saw somewhere that you should be
> able to slide a sheet of photographic paper through the slit. there's an
> awful lot of room for experimentation with this.
> ----- Original Message -----
> From: George L Smyth <glsmyth@yahoo.com>
> To: <pinhole-discussion@pinhole.com>
> Sent: Thursday, August 31, 2000 6:59 AM
> Subject: [pinhole-discussion] Re: Slit-apertures ?
>
> >
> > --- Sebastian Nieder <sebastian.nieder@gmx.de> wrote:
> > > Hi !
> > >
> > > Has anyone ever tried slits ?
> > > I've read in the "E.Renner-Bible", that you have to cross two slits for
> > > getting a disorted image.
> > > But there's no info about how far the slits have to be away from eatch
> > > other; what slit-diameters are the best etc.
> > > I've done several tries, but non of them seems to be perfekt.
> > > Does anyone have some formulas e.g. ?
> >
> > I tried slits but was not able to create a slit to my liking. If anyone
> has a
> > good methodology for making slits then it would be nice if you could share
> it
> > with us.
> >
> > Cheers -
> >
> > george
> >
> > =====
> > Handmade Photographic Images
> > http://members.home.net/hmpi/
> >
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Received on Thu Aug 31 20:37:18 2000