RE: Pinhole Light Meter

John
I love it. Are you thinking about manufacturing them or are you going to
post the details? I also don't think size is as important as functionality.
Is the box on the side the shutter control?
Thanks again & have a great weekend?
regards
Andy Schmitt

-----Original Message-----
From: owner-pinhole-discussion@spitbite.org
Sent: Friday, August 04, 2006 1:03 AM
To: pinhole-discussion@spitbite.org
Subject: [pinhole-discussion] Pinhole Light Meter

Hi

I have been taking Pinhole Images with a Zero 2000 Pinhole Camera for about
7 years.

To improve the exposure accuracy of my images I have created a prototype
specialist Light Meter especially for my Pinhole cameras. One of its more
unusual features, and the main one I wanted, is that it integrates or sums
incident light over the exposure time. Thus a creating perfect exposures in
variable lighting conditions (sunsets, clouds, multiple flashes, etc.) . The
f/stops I use are f/45, f/48, f/55, f/128, f/138, f/158, f/176, f/216, f/235
but they are just programmed into the microcontroller. Film ISO/ASA rating
(ISO 3 to 8000 in 1/3 stop increments). I user Fuji Provia F100 which
appears to have negligible reprocity but that could easily be programmed in.

It also functions as a Timer, Normal Light Meter and via its TTL output and
a battery powered prototype Shutter Driver I created it can control shutters
like the ILEX No 3. Synchro Electronic Shutter (which you can buy off eBay
for US $20) or Melles Griot 04 IES 213. I currently use it with a heavily
customised Zero 2000 Pinhole Camera and "UltraThin"
Melles Griot 04 UTS 203 Electronic Shutter.

Here are some pictures of the functioning prototype
http://www.flickr.com/photos/92561604@N00/sets/72157594223607004/

I'm kind of wondering if it's worth taking this project further, would
anyone else want to use such a device?

All the best

John
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Received on Fri Aug 4 13:13:56 2006