Re: [pinhole-discussion] Slit images

2002-01-03 Thread Richard M. Koolish
> I was recently in Tokyo on a business trip and didn't
> have many early appointments. Tending to want to sleep
> in, I would leave the heavy hotel room curtains closed
> at night so the early morning sun wouldn't wake me.
> One morning I was delighted to wake up to see an
> upside-down image of the scene outside projected on
> the walls of the room--created by a slit where the
> curtains didn't quite close. Just goes to show that
> even an extremely crude slit or hole will form an
> image! Reminds me of my very first experiments with
> pinholes in high school in the 70s--all I ever did was
> punch holes in tin foil with a pin and then tape the
> foil to a camera body. Worked fine.
> 
> Colin 


The same thing happens in my bedroom at home.  The curtains form
a slit, and a large pine tree in the yard next door is projected
upside down on the wall.



[pinhole-discussion] Slit images

2002-01-02 Thread Colin Talcroft
Hello everyone--Happy New Year

I was recently in Tokyo on a business trip and didn't
have many early appointments. Tending to want to sleep
in, I would leave the heavy hotel room curtains closed
at night so the early morning sun wouldn't wake me.
One morning I was delighted to wake up to see an
upside-down image of the scene outside projected on
the walls of the room--created by a slit where the
curtains didn't quite close. Just goes to show that
even an extremely crude slit or hole will form an
image! Reminds me of my very first experiments with
pinholes in high school in the 70s--all I ever did was
punch holes in tin foil with a pin and then tape the
foil to a camera body. Worked fine.

Colin 


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