Re: BOUNCE pinhole-discussion@spitbite.org: Non-member submission from [Richard Heather <rheather2001@yahoo.com>] (fwd)

Good progress has been made on the light meter and shutter driver. The
light meter now has a piezo buzzer and I / we are working on the maths
for accommodating various film's reciprocity characteristics. A few of
these may be available in various forms.

Check out the light meter thread on
http://www.f295.org/Pinholeforum/forum/Blah.pl/Blah.pl?b-cm/ for further
information.

The shutter driver can be use stand alone either driven by a 5V signal
or the press of a button.

All the best

John

----- Original Message -----
From: "Eric S. Theise" <mataro@cyberwerks.com>
To: "Pinhole Discussion" <pinhole-discussion@spitbite.org>
Sent: Monday, August 07, 2006 2:08 AM
Subject: [pinhole-discussion] BOUNCE pinhole-discussion@spitbite.org:
Non-member submission from [Richard Heather <rheather2001@yahoo.com>]
(fwd)

>
> I would be interested. I have a Melles Griot shutter that need
electronic control.
> Richard Heather
>
> John Fletcher <jfl10593@bigpond.net.au> wrote:
> 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 Mon Sep 18 22:46:59 2006