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06-09-2016, 10:07 AM   #1
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Available Pinhole lenses?

Anyone use a Pinhole lens like the Rising Standard Pinhole for Pentax K Mount RPSP001 B&H Photo ?

I'd like to mess around with one this summer but not sure which one to get.

Thoughts please.

Eric

06-09-2016, 10:23 AM - 2 Likes   #2
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I have spent a few $ on some ebay versions and found them awful. But the precision of the hole and the size may make a huge difference. The actual f/stop is very far into diffraction so obviously you get fuzzy images. I'd be interested in anyone's results that are worth keeping. I haven't made a single useful image with my cheapie ebay one.
06-09-2016, 09:01 PM - 2 Likes   #3
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You can make your own using a black body cap, a piece of brass shim and a sewing needle. Most of the pinhole lenses for sale are very similar to each other.
04-24-2017, 09:32 AM   #4
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Taken with a cheapie off ebay:


04-24-2017, 10:39 AM   #5
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QuoteOriginally posted by UncleVanya Quote
I have spent a few $ on some ebay versions and found them awful. But the precision of the hole and the size may make a huge difference. The actual f/stop is very far into diffraction so obviously you get fuzzy images. I'd be interested in anyone's results that are worth keeping. I haven't made a single useful image with my cheapie ebay one.
Quite so! Yet a high quality pinhole won't be much sharper than a low-quality one, only the overall contrast will be better.

The physics (fuzzics?) of pinholes all but guarantees a blurry image: big pinholes render everything as bokeh the size of the hole (which might be 70-150 pixels in diameter) and tiny pinholes blur everything with diffraction. The math also means that pinhole performance is better on larger format cameras and at wider angles (but those wide angle geometries don't work well with digital sensors).


In general, pinhole images are only nice if that ethereal look -- a fancy-pants word for blurry -- adds to the image. The extreme DoF and motion blur from long shutter times with pnholes can also be interesting. But it's often it's possible to get much better extreme DoF images using wide angle lenses at minimum aperture or focus stacking. And motion blur can be created using and ND filters or interval composite.

That said, a pinhole lens can be cheap fun and certainly can exercise one's composition skills because without the benefits of sharpness, it's the overall shapes and forms in the image that have to make it good.
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