Re: New site pinhole

Thanks, Eric and Chris,

So it sounds like what I need is either a smaller inner circle, or more
pinholes, to get the very short focal length I want and still have a
seamless blend between the pictures.

For both of the links you provide below to Dirceu's site I get this
error message:

Desculpe, este site está temporariamente indisponível!

which I read as "sorry, the site is temporarily indisposed" like it
caught the flu or something. I actually tried to learn Portugese once,
when I was in first grade. We got to order books at school for something
like 25cents apiece and I ordered a book called "Portugese through
Pictures." I worked at it for a while but it was hard going. There would
be a drawing of a stick figure, and then Portugese words underneath. No
English translation, no suggestion of how to pronounce the words. You
didn't know whether the words under the stick figure meant "Here I am"
or "Hello" or "I'm hungry" or "The boy is standing" or "The man is
waiting" or what --you had no idea. It was very confusing for a first
grader, I must say, and that was the end of my trying to learn
Portugese.
Katharine

Pinhole Blender wrote:
>
> Katharine,
>
> Yes I said that. Here is the message I sent to Dirceu,
>
> ------------------------------------------------------------------------------------------------------
> Nice site. Thanks for including me in your links page. In Eric Renner's
> book on Pinhole Photography he says that to have a seamless blend of
> the images from each pinhole you at least need to have the radius of
> the center tube equal the focal length, then you can evenly space you
> pinholes 60 degrees apart on the outer can. I have found that this is
> the minimum focal length for seamless images but you can do longer
> focal lengths and still have seamless blends. I like the separation
> your camera makes but if you want to make it more seamless, try these
> suggestions.
> -------------------------------------------------------------------------------------------------------
>
> On Dirceu's website he had images of how he constructed his camera. Here
> is the link
> http://geocities.yahoo.com.br/dimaues/camerasexpo06.htm
> You can see how big his inner tube is compared to the outer tube, this
> coupled with the placement of the lenses will leave some black edges
> between the frames. You can see this in his images
> http://geocities.yahoo.com.br/dimaues/imagensbombom.htm . The black
> edges may work for some images. It looks like Dirceu's pinholes are
> spaced 90 degree's apart. Eric says to use 60 degree's, perhaps you can
> use a bigger circle with closer lenses. If you look in his book at David
> Lebe's cameras you can see a larger arc and holes closer together to
> give a nice blend to the image. If you don't have it, Eric Renner's
> book is a great addition to your library, I hear there is a third
> edition out now. On my directions page on my website you can see the
> size relationship of my inner tube and outer can. The link is in my
> signature.
>
> Chris
>
> --
> Pinhole Blender
> chris@pinholeblender.com
> http://www.pinholeblender.com
>
> > -------- Original Message --------
> > Subject: Re: [pinhole-discussion] New site pinhole
> > From: "Katharine Thayer" <kthayer@pacifier.com>
> > Date: Sun, December 19, 2004 10:30 am
> > To: pinhole-discussion@spitbite.org
> >
> > Did someone just say that to get a seamless image with a circular
> > camera, the focal length should be at least the radius of the inner
> > circle? I thought I just saw that, and now I can't find it.
> >
> > If this is true, then I'm going to need to abandon the camera I'm in the
> > middle of building and start over, so I hope someone will confirm this.
> > I was going by the formula that says that the image circle=focal length
> > x 3.5, so thought I was in good shape, but my focal length is only half
> > the radius of the inner circle.
> >
> > (I can't see the images that were being referred to in the lost post,
> > because the site doesn't like my browser and though I can access the
> > main page okay, if I click on any of the links all I get is a blank
> > grey page.)
> > Katharine Thayer
> > _______________________________________________
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Received on Sun Dec 19 21:19:59 2004