Lens hood on pinhole camera

BrianShaw · Feb 12, 2020

Is this of any value...

BobD · Feb 12, 2020

If you have a cap that fits the hood snugly then there is your shutter.

DWThomas · Feb 12, 2020

I suspect a pinhole with a smooth, cut edge that has not been chemically blackened might contribute a bit of flare if the sun strikes it directly at an oblique angle, but I doubt the problem would approach what is seen with multi-element lenses. Most of mine function without a hood. The one that does have a hood is a body cap that fits my Bronica SQ-A. It uses a plastic spray paint can top and mostly just makes the camera look "more normal."

BrianShaw · Feb 12, 2020

Thanks!

grain elevator · Feb 12, 2020

Couldn't the sun shining through the pinhole, projected at at a wall of the camera, produce flare if it's reflected inside the camera? Especially if the interior isn't well blackened? Of course the bit of concurrent flashing could be just what's needed, especially with paper negatives...

BrianShaw · Feb 12, 2020

grain elevator said:
Couldn't the sun shining through the pinhole, projected at at a wall of the camera, produce flare if it's reflected inside the camera? Especially if the interior isn't well blackened? Of course the bit of concurrent flashing could be just what's needed, especially with paper negatives...

That’s what started me thinking...

DWThomas · Feb 12, 2020

grain elevator said:
Couldn't the sun shining through the pinhole, projected at at a wall of the camera, produce flare if it's reflected inside the camera? Especially if the interior isn't well blackened? Of course the bit of concurrent flashing could be just what's needed, especially with paper negatives...

That is a good point I didn't consider. My home made cameras initially get the interior sprayed flat black or use the body of a commercial camera so I tend to assume everybody does that.

grahamp · Feb 12, 2020

The best bet is to cut down internal reflection. When you look at the geometry of a typical 'wide' pinhole camera, any lens hood has to be very shallow and very large, which gets in the way of most 'shutter' solutions. I usually have a fair idea of where the angle of view of my cameras falls, so I can hold something out of view to shade the pinhole. Or just roll with the result of not shading it.

AgX · Feb 12, 2020

If the innards of the camera are blackened only reflections off the rim of the hole remain. I consider these more theorethical. But in case I am wrong, one still could darken brass for instance chemically.

BrianShaw · Feb 12, 2020

Thanks. More good insights to consider. My camera is dark black matte innards. So probably not a problem.

Nick Dvoracek · Mar 9, 2020

My experience at: https://pinholica.blogspot.com/2019/07/quality-assurance-user-experience.html

BrianShaw · Mar 9, 2020

Thanks Nick! Very interesting.

Lens hood on pinhole camera

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