build a pin-hole lens

build a pin-hole lens with a thin sheet of brass, suitable for digital SLR camera
To make a smaller pinhole than the needle itself, just dent the brass and polish the bump on the other side. <br> <br>If you don't have brass, cut a piece of aluminum from a soda can.
exact, even then I have done so ... <br>This video was the first pin-hole that was building. <br>thanks ...

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