"Korona 8x10 Pinhole Camera"
3.5" to 15" Focal length Pinhole Camera


This is a photo of the Korona Home Portrait Pinhole Camera.
I made a lens board and adapted it to add a homemade pinhole turret. 
This allows me to adjust the focal length like a zoom lens and still have the appropriate pinhole aperture. It uses 8x10 film holders.


The pinhole aperture is visible in the lens board and I can tape colored gel filters on the back of the lens board as required.  No ground glass is used because the image is so dim.  I sight from corner to pinhole to get and idea of what is in the image field.


This is a detail of the pinhole turret.
The turret allows me to adjust the focal length like a zoom lens and still have the appropriate pinhole aperture.  The black arm is my shutter and the chart is a matrix of effective F-stops for exposure calculations.


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