On Sun, 11 Feb 2001 20:12:51 -0000, "John Duggan"
<john.duggan1@xxxxxxxxxxxxxx> wrote:
> Dear all,
> Regarding pinhole photography, I have found 2 methods
>that work well with pupils in school.
> Method 1.....Grind the end off a small sewing needle using an
>oilstone. Place an aluminium strip, pie-dish? on a hardwood block, place
>needle on strip and tap with a small hammer. The aim is to punch out a
>small disc of aluminium rather than to pierce a hole with a point.
Would it help to use a hollow needle, e.g. from the smallest available
size syringe? Or would even that be too thick?
Frank van Lindert
Utrecht NL.
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