Re: [pinhole-discussion] needle measurer
Larry Bullis wrote an article on how to make accurate holes using a set of feeler gauges and a pin vise (Reprinted from: Pinhole Journal Vol.3*2, August 1987, page 32): http://www.p at ???/resources/articles/poke.html or a PDF version at: ftp://ftp.p at ???/poke_doc.pdf - Gregg At 08:48 AM 2/10/01 -0600, you wrote: It's more difficult to measure the hole than the boring tool, which is easy with a vernier caliper that goes to .001 or so. What I've done is measure and mark (with tape so it's easy to stop at the right diameter) small sewing needles. Pam _ Pinhole Visions at http://www.p at ???
Re: [pinhole-discussion] needle measurer
G.Penate wrote: You could also use your flatbed scanner, here is a small article I wrote about how to do that: http://members.home.com/penate/diameter.htm Try it, it may give you all the precision you need Guillermo, I normally use my enlarger to measure my pinhole but the flatbed scanner technique is brilliant. You can be sure I'll try it next time I have a pinhole to drill. For those who have access to an accupuncturist, ask them for a needle, they drill the best holes you can get (IMHO) when you are working with short focal lengths. Guy
Re: [pinhole-discussion] needle measurer
Chris, Micrometers measure to 1/10,000 of an inch... I think I've seen them at true-value hardware for around $30. They're probably poor quality though. I have a set of dial calipers that measure to 1/1000 of an inch that I got at the swap meet for $12. I've never had to measure pinhole needles any more accuately than that. As for purchasing one, check your local swap meet. I regularly see micrometers there, dial calipers are a more rare, and vernier calipers are pretty common. I find vernier calipers hard to read, and I think they only measure to hundredths of an inch. If you can't find one locally, try MSC industrial supply (www.mscdirect.com). Here's the part#s for some cheaper ones: PH76350016 - 0-1 micrometers, .0001 graduations - $19.95 PH76367044 - 0-4 dial calipers. .001 graduations - $16.99 PH76367069 - 0-6 dial calipers. .001 graduations - $19.95 John - Original Message - From: Christina Z. Anderson tra...@mcn.net To: Pinhole List pinhole-discussion@p at ??? Sent: Friday, February 09, 2001 4:57 PM Subject: [pinhole-discussion] needle measurer Does anyone know where I could find a.is it called a micrometer, a gauge, or whatit is a small plate that has a series of holes in it that will measure needles to the hundredth of a millimeter? I don't even know what it is called to look for it. Apparently it is not a jeweler's item, and is not available at the hardware store, because I have tried both places (unless I want to measure drill bits). Chris ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.p at ???/discussion/
[pinhole-discussion] needle measurer
Does anyone know where I could find a.is it called a micrometer, a gauge, or whatit is a small plate that has a series of holes in it that will measure needles to the hundredth of a millimeter? I don't even know what it is called to look for it. Apparently it is not a jeweler's item, and is not available at the hardware store, because I have tried both places (unless I want to measure drill bits). Chris
