RE: Pinhole Light Meter

I like it too... I don't think size is that much important - since you
usually have to carry your tripod around when shooting pinholes. And my
Zero 4x5 is not quite small (after adding 3 extention frames).

Good job John!

Regards,
Loris.

-----Original Message-----
From: owner-pinhole-discussion@spitbite.org
[mailto:owner-pinhole-discussion@spitbite.org] On Behalf Of Pinhole
Blender
Sent: 04 Ağustos 2006 Cuma 14:25
To: pinhole-discussion@spitbite.org
Subject: RE: [pinhole-discussion] Pinhole Light Meter

I love it, its the variable lighting conditions that confuse my
students. It would be great to have an electronic shutter controlled
light metered Quaker oats camera. But seriously I think this is a
wonderful idea, I would buy on if it was smaller.

Chris

--
Pinhole Blender
chris@pinholeblender.com
http://www.pinholeblender.com
> -------- Original Message --------
> Subject: [pinhole-discussion] Pinhole Light Meter
> From: "John Fletcher" <jfl10593@bigpond.net.au>
> Date: Fri, August 04, 2006 1:03 am
> To: <pinhole-discussion@spitbite.org>
>
> 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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