RE: Slit manufacture

Eric -

I think that they were using it to pass camels. <g>

Cheers -

george

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 --- On Thu 02/03, Eric < eric@landguard-manor1.demon.co.uk > wrote:
From: Eric [mailto: eric@landguard-manor1.demon.co.uk]
To: pinhole-discussion@spitbite.org
Date: Fri, 4 Feb 2005 00:03:48 -0000
Subject: RE: [pinhole-discussion] Slit manufacture

Tom <br><br>Have you considered using the slit in a sewing needle, I seem to have heard<br>of some guys doing this somewhere<br>Eric M<br><br>-----Original Message-----<br>From: owner-pinhole-discussion@spitbite.org<br>[mailto:owner-pinhole-discussion@spitbite.org] On Behalf Of Tom Hawkins<br>Sent: 03 February 2005 16:14<br>To: pinhole-discussion@spitbite.org<br>Subject: [pinhole-discussion] Slit manufacture<br><br>Hi there folks,<br><br>Firstly thanks to all those who mailed me a new year card and apologies for<br>not yet sending mine out. I decided to get some 'proper' postcards printed<br>back at the beginning of January I had some difficulty finding a reasonable<br>printer but now I have found one and I should be sending the cards out next<br>week. I've enjoyed all your photos immensely.<br><br>I am writing to see how people make the slits in their slit cameras. It is<br>quite a long story and I'll be as concise as possible.<br><br>Apart from being a pinhole photographer in my spare time I am a<br>deve
lopmental biologist working on brain development in the zebrafish<br>(Brachydanio rerio). We use an interesting protein called kaede which is<br>derived from a stony coral that we have been using for our studies (see<br>http://tinyurl.com/673qb for details). This is useful because it will<br>fluoresce green normally but when excited with UV light between 350-400nm it<br>changes to red.<br><br>What has this got to do with pinholes and slits? Well, two (three?) pinhole<br>days ago I took a colleague and her bloke out to take their first pinhole<br>photographs (Philippa Bayley and David Rossi: look them up if you like).<br>She ended up working with kaede and was trying to figure out a way of<br>restricting the UV conversion of the protein from green to red. Of course,<br>after our day out she thought of the pinholes I make for my cameras. So she<br>got me to make her some pinholes out of brass shim. She used these in her<br>microscopes to convert kaede in only a few cells and it was all very nice<br!
>for her

 thesis.<br><br>Now she has gone off to Oregon to work and has got talking to folks along<br>the way and I've had several requests for pinholes from the folks she has<br>talked to. Despite my attempts to refer these folks to commercially<br>available laser drilled holes they seem to prefer my homespun version (the<br>zebrafish community is a bit like this). Now I've got a request from Chuck<br>Kimmel in Oregon who is asking about small slots or slits to convert kaede<br>in multiple cells in a line.<br><br>So I want to know if there is a good method to make nice small slits in shim<br>stock. I've seen plenty of fine slit photographs so there must be many<br>folks on the list who can make them. I tried a quick search of the archive<br>and the web but didn't find anything would be most grateful if anybody has a<br>good method to let me know. Should I use a scalpel or something?<br><br>For the record I usually use the needle poking method not the tiny drill bit<br>method to make holes in my brass.<br><br>Ma
ny thanks for your time and sorry for the long post.<br><br>Best<br><br>Tom<br>_______________________________________________<br>Post to the list as PLAIN TEXT only - no HTML<br>pinhole-discussion mailing list<br>pinhole-discussion_at_spitbite.org<br>FAQ at http://spitbite.org/pinhole-discussion/list.html<br>_______________________________________________<br>Post to the list as PLAIN TEXT only - no HTML<br>pinhole-discussion mailing list<br>pinhole-discussion_at_spitbite.org<br>FAQ at http://spitbite.org/pinhole-discussion/list.html<br>

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Received on Thu Feb 3 18:43:04 2005