Archived posting to the Leica Users Group, 2000/05/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 3:41 PM -0400 5/22/00, Tom Schofield wrote: >Agreed, but if you are doing it yourself with aluminum foil and a pin, >without a machine cutting a precision pinhole, then "as small as you can >make it," is probably the best approximation of optimum size, isn't it? Probably pretty close, especially if you are making it yourself in a bodycap for use directly on a body. Optimal diameter for 50mm distance from the film is around 1/4mm to 1/3mm, and for 125mm distance about 1/2mm. You have to get to 500mm distance before 1mm diameter starts being the right size. The best thing is to find/get hold of a micrometer, and measure some sewing needle diameters. Then you can tell what you are doing, and it makes it easy. At body cap distance on an RF Leica you should probably try for about 0.2mm. The most important thing is to use very thin material and have the hole as round, smooth and free of burrs as possible.....and stay away from that Tech Pan! * Henning J. Wulff /|\ Wulff Photography & Design /###\ mailto:henningw@archiphoto.com |[ ]| http://www.archiphoto.com