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Old Jan 23rd 2019, 08:23 AM   #1
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Question Camera obscura: light behavior

Hello everybody!
Sorry in advance for my wrong terminology.

I'm Luca from Italy and I have a question about a pinhole camera.

As it was designed, the angle of view is about 111.
But the light cone "touches" the surfaces A and B inside the camera.

Question. What will it happen to the angle of the cone? Is there a formula to obtain the new angle? Will this angle decrease in degrees?

Please see the attached image. Camera from above.

Thank you.
Luca
Attached Thumbnails
Camera obscura: light behavior-camera_ob.png  

Last edited by lbkwtz; Jan 23rd 2019 at 08:27 AM.
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Old Jan 23rd 2019, 09:53 AM   #2
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The structures at A and B will cast a shadow on the screen
effectively reducing the angle of the light cone.

If the structures at A and B are not deeply black,
you could suffer from reflections off them polluting the image.
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Old Jan 23rd 2019, 10:05 AM   #3
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Thank you. With "screen" do you mean the film? It's a pinhole camera.

Thanks again.
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