Laser drilled pinhole source

[2F/2F]

Lenox Laser makes a great product IME. Expensive, but if you are after the best sharpness you can get from a pinhole, it's the way to go.

[jnanian]

i bought from william christiansen back in the day he was called
minute aperture ... he's on ebay and goes by the name "pinholebilly" .
great pinholes at a great price

here's an interview with him

http://www.withoutlenses.com/article...ole-is-pinhole

and here is his website
http://www.pinholeedun.com/Welcome.html

[Mustafa Umut Sarac]

Most accurate pinholes made by chemicals. There was a British or American inventors who tries to collect preorders and make 35mm camera pinholes. I think someone can may be remember them. After learning their names , contact with them and learn who does the etching. Again , may be at APUG or f295 , someone knows the company does these stuff.

Umut

[Rich Ullsmith]

Thanks for the resources, everybody.

About measuring diameters, I mounted my pholes on a 35mm slide and projected it, then a little algebra. I had a chance to put them under a scope with a micrometer slide, and they are surprisingly accurate.

[debanddg]

+1 to what Shane said... was going to point you to Earl anyways..

[Jim Jones]

. . . Looking to replace all my pholes with fresh laser drilled. Can these be made with a +/- .01mm tolerance? I have all my cameras set to about f250, that is, I did the math for the hole-to-film plane distance, and I made a few dozen holes and selected the ones closest to make the math work. . . .

There is little need for pinhole diameter accuracy finer than several percent, even for critical pinhole photography. There is nearly a 2:1 ratio between the largest and smallest diameter pinholes commonly used for each focal length. Nor do the popular pinhole diameter calculators closely agree. Carefully made by hand pinholes can be as clean and accurate as laser drilled ones. More important is selecting the correct diameter for the focal length, color of the light used, angle of coverage, and magnification ratio.

[Tom Miller]

I've used EMS apertures for years and they are Excellent. No need to spend any more than Earl's price.