funny...

Never tried it, but have checked out different possibilities from time to time. His sample photos don't look too shabby to me, and the wooden pinhole camera he has for sale looks interesting. (Although I don't really get the need/desire for a top & bottom panoramic exposure on the camera... maybe that's common in the pinhole world... dunno.)
 
I was suprised at first by the post because a "pinhole" is a lens. So you cannot have a pinhole lens.

But I see know that it is a lens mount adapter that allows you to then put in various diameters of pinhole "shims".

This could be a fun way to try pinhole photography - which after all is nothing more than a tiny, unimpeded light hole shining onto a sensitized medium (i.e. film).

So, rather than carting around a wooden box with one shot at a time LF film capabilities - this will enable you to make multiple shots at multiple diameters. And do it on one roll of 35mm film!

If you're into pinhole - this is a very nice gadget!
 
Usually you would only want to use one size pinhole, on something like this with a fixed focal length, for best results. There is an optimum size, for sharpness, based on the focal length, which is the distance from the pinhole to the film plane. I have a gallery of pinhole photos taken on 120 roll film. I paid close attention to the pinhole size and the photos came out almost sharp.

A pinhole is not considered a lens. A lens is an optical device that diverges or converges the light path. Pinhole photography is considered lensless photography. It's also fun photography.
 
I have made something similar. I got a set of 39mm extension tubes(so I could have various focal lengths) and a generic metal LTM body cap. Drilled a large hole in the cap(this size isn't too critical--just large enough that there is no vignetting from the thickness of the cap) and then taped a piece of thin brass to thew back(camera) side of the cap.
I haven't been very rigorous in how I've used it but here is one of the photos I shot with this contraption. Something around 35 or 40 mm focal length. Exposure was 45 seconds on 400 speed film. I should have shot at a minute or a little more but it was starting to rain and I didn't want to get the camera wet.
Some of you have seen this water fall before. (Tinker's falls)
Rob
 

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Although pinholes on 35mm film are technically possible, I find the results generally unsatisfactory. There's often just that bit of detail lacking that makes the picture, often aggravated by the thin exposure. 120 film is just cutting it..

Here's one I did on 6x6 of a light bulb..
 

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