RE: New site pinhole

Katharine,

Yes I said that. Here is the message I sent to Dirceu,

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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.
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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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