panorama

John,

Thanks for the comments. The panorama camera does take multiple rotations --
20-30 minutes worth, using Tmax 400 film. There is a definite relationship
between how much light the solar panels absorb and the speed of the motor and
therefore exposure, but I'm not sure how linear the relationship is -- probably
not very. However, the number of rotations (if one has the patience to count
them) is probably a pretty good indication of exposure. More importantly, by
adjusting the angle of the panels (they're at about 45 degrees from horizontal
and sloping down in the direction of the camera's aperture), the camera's
rotational speed can be made to vary depending upon the amount of light
available in the direction it's facing, and so it automatically adjusts for
variations in scene brightness.

I like to take pinhole pics using as large a format as possible, so that the
still elements are as sharp as possible and therefore contrast more with the
elements in motion -- water, clouds, etc.

Joe

John Yeo wrote:

> Hi Joe,
> Welcome to the list. Great website. I'm curious about your panoramic
> camera. Does it make only one rotation, or multiple rotations? From the
> description, it sounds like it makes multiple revolutions. What is the focal
> length? That's neat you drive it with photovoltaic cells. I wonder if
> there is any way to base the exposure on how much power the cells are
> putting out. Something like figure out how many revolutions it takes to
> make a photograph, and then let it do that many revolutions no matter what
> the light conditions. When the light is low, the cells would turn the motor
> more slowly, and it would take longer to go through the given number of
> revolutions. These are just random thoughts, not much behind them :~)
>
> The McKinnley falls one looks very sharp... doesn't reallly look pinhole at
> all. I still like it though.
>
> John
>
> ----- Original Message -----
> From: "Joe Huck" <joehuck@io.com>
> To: <pinhole-discussion@pinhole.com>
> Sent: Monday, May 28, 2001 5:16 PM
> Subject: [pinhole-discussion] intro
>
> > I just signed up for the discussion group, so I'm sending this email by
> > way of introduction. I'm really impressed by what I've seen at
> > Pinholevisions. Can't wait to follow all the links and see where they
> > lead.
> >
> > I've been doing various types of lensless photography off and on for a
> > number of years. I tend to get carried away with building strange
> > cameras, often to the detriment of the actual photography. Hope to
> > remedy that somewhat in the near future, as time allows.
> >
> > I'm now (at mid-life) in the process of starting a new career in fine
> > arts. My web site ( http://www.io.com/~joehuck/ ) is pretty much
> > dedicated to this effort, but has a section on lensless photography.
> > Please check it out if you're interested. I'd love to get some feedback.
> >
> > Joe Huck
> >
> >
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> >
>
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Received on Wed May 30 10:32:36 2001