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 Thu Aug 3 22:03:32 2006