Re: World's largest pinhole camera

If I remember well, it was 2.6mm with an f/stop of F500 something. Focal
length was 48 in. The pinhole diameter was well in excess of optimal, to
reduce exposure time on a very cloudy day.

An interesting feature of these people's project is that their focal length
relative to print size yields an angle of view about equivalent to a 30mm
lens on 24x36mm film. I personally would have chosen a much wider angle of
view, both to reduce the focal length/exposure time and to widen the image
coverage. I can't imagine how they will be able to make their hangard
completely light-tight.

BTW, congratulations to Rui Cambraia for his giant pinhole work
http://www.ruicambraia.net/projectos/fotografia_pinhole/pinholeday_300406/pinholeday_2006_arco_camara.htm

Guy

----- Original Message -----
From: "Wolfgang Thoma" <taco@thoma.be>
To: <pinhole-discussion@spitbite.org>
Sent: Friday, May 19, 2006 3:22 PM
Subject: Re: [pinhole-discussion] World's largest pinhole camera

> Guy Glorieux wrote:
>> Jan,
>>
>> According to Mr. Pinhole Calculator, if these people want to use a
>> focal length of 80 feet (!), the optimal pinhole diameter should be a
>> mere
>> 6.58mm, yielding an effective F/stop of F:3706 !! That is very slow!
>>
>> Then, imagine coating a piece of linen 25x100 feet with 20 gallons of
>> Liquid
>> Light. Not to mention processing. Hmmm.
>>
>> Best,
>>
>> Guy
> Guy,
> I can't remember. What pinhole diameter did you use for your famous hotel
> shot in Montreal?
> taco
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Received on Fri May 19 12:45:30 2006