Another 4x5 pinhole

[BetterSense]

I would buy a laser-cut one if it wasn't so expensive.

I still think a chemically-etched pinhole would be the best, because then the edges would taper down to a perfect edge. I'm trying to figure out how I can make one at work.

I kept noticing when I was scanning my pinholes to measure them, that there was often burrs or other jagged edges on them. Maybe I'll make a bunch of pinholes in a piece of can, then look at them in the microscope at work, and pick out the best-looking one.

[bobwysiwyg]

I've never owned/used a pinhole cam. but it does interest me. I follow the related threads quite a bit. What do you experienced folks think of this?

http://cgi.ebay.com/Skink-Laser-cut-...03179004r24511

[BetterSense]

I think they look really cool, and I would like to have precision pinholes, but at $30, it's too ironic for me. Plus, I have seen people selling complete assortments of laser-cut pinholes for that much money, and not just one size.

[CuS]

Originally Posted by BetterSense

I kept noticing when I was scanning my pinholes to measure them, that there was often burrs or other jagged edges on them.

I have th same issue - mine are often very jagged and burred under scanning. An idea mught be to mount a sewing machine needle in a drill press and drill the pinhole at high speed - this might plasticize the metal at the edges of the hole and reduce burring.

Etching would be teh best though - the lands would be sloped.

[DLawson]

Originally Posted by bobwysiwyg

I've never owned/used a pinhole cam. but it does interest me. I follow the related threads quite a bit. What do you experienced folks think of this?

http://cgi.ebay.com/Skink-Laser-cut-...03179004r24511

They're a couple bucks cheaper here:
http://www.lenoxlaser.com/pinholepho...ed_lenses.html

If I read the forms correctly, shipping is about half the eBay item's.

(Haven't used Lenox, just bookmarked the site.)

[DWThomas]

Hmm - those Skink "pancakes" are quite elegant. A Canon FD model would look nice on my A-1, wish they made one for Bronica SQ family! But by the time you get a pinhole, you're talking $60 with shipping. The Lenox looks like a less expensive way to find out how much better a laser drilled hole is, and I like the fact that they have closer size intervals. From 0.7 to 0.8 mm isn't such a big jump, but from 0.2 to 0.3 certainly is.

Enh, maybe before next April I'll get something to try.

Thanks for the links.

DaveT