First you might want to see: http://www.pinhole.com for links to properly
sizing and making pinholes (and some galleries too), such as
http://members.home.net/penate/pinsize.htm
Then also see here for buying pre-made pinholes (Edmund Scientific sells
precision pin holes):
http://www.edmundoptics.com/IOD/DisplayProduct.cfm?productid=2001
http://www.edmundoptics.com/IOD/DisplayProduct.cfm?productid=1794
Cheers,
Gerald
----- Original Message -----
From: "D. Glenn Arthur Jr." <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, March 04, 2001 11:26 AM
Subject: Pinholes (was Re: glenn's peephole fisheye)
> Steve Larson
> > Glenn wrote:
> > > Field of view on a pinhole can be changed with extension tubes, BTW.
> > > And you're right about precision of the hole -- I've not yet managed
> > > to get one sharp enough in the thin sheets of brass I'm using (taped
> > > across a larger hole in the plastic body cap). [...]
> > What did you use to make the hole?
>
> I've used a sewing needle (yes, I bent it in the process, but I've got
> more) to make holes in aluminum foil and two different thicknesses
> of brass, not letting it go in to its widest point. And I've used a
> small nail (a wire brad) to _dimple_ a sheet of brass and then ground
> off the tip of the dimple with a Dremmel tool. I'm not sure just how
> small the holes needs to be for the effect, but if it can be as large
> as my smallest drill bit, that's the next thing to try.
>
> Anyone know whether the _thickness_ of the sheet matters (i.e. the
> length of the hole)? My guess is that it does, but I'm tempted to
> try melting a hole through plastic with a hot needle if it doesn't.
>
> > Also, did you put up any of those
> > pics of the police raid, in case I missed it?
>
> Not yet -- just got one roll back from the lab Friday and haven't
> had time to play with the scanner yet. The other roll isn't back
> yet.
>
> -- Glenn
>
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