----- Original Message -----
From: "Murray" <uptown@uptowngallery.org>
> Since I 'converted' an old SLR, I'm tempted to use the existing shutter, but
> the whole reason I chose that camera was because it's shutter was slow.
>
> So, I am scheming over an idea (other side of my brain) for an electronic
> circuit to allow me to measure the duration of the shutter opening...I have
> an idea, but if anyone has run across something similar on the 'net
> somewhere and is willing to refer me, I'd appreciate it.
Murray,
There are several inexpensive ways to measure shutter speeds. I made the simple circuit shown in this page: http://www.geocities.com/Yosemite/2131/shspeed.html and it works pretty good. The hard part was getting the BPW40, it is made in Europe and seems not to be sold in Canada (couldn't find it in Toronto, anyway). I'd have used an equivalent one but couldn't find BPW40's specs either. Due to the beauty of Internet I ended up trading phototransistors for ZonePlates with an Italian photographer (thx Daniele!), no doubt we now live in a Global-Village.
More ideas can be found here: http://www.smu.edu/~rmonagha/mf/shutterspeed.html
Hope it helps,
Guillermo
Received on Tue Jul 24 21:06:25 2001
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