Zone Plate Blur
on a piece of film
The "PinholeDesigner" goes I think the easiest way. Man wearing a the necessary parameters and can can be created by the program a PDF. Printed on good paper and photographed the print on Lithfilm at right angles, (the scale can be under the tab "Magnification" calculate distance camera - expression) developed and completed, the zone plate. When KB-I think this movie has only the Kodak Technical Pan. If Repro is a device for magnifying device, and "slash film is also a possibility.
The Pinhole Designer David Balihar a freeware program for Windows computers, which can calculate almost everything around pinhole and zone plate photography.
I went a third way. Since I did not know the Pinhole Designer, I have a template that I had found on the Internet, in the graphics program increased traced and a service bureau, which produces films for offset printing, where my free hand file for the exposure.
And who wants to save all the drudgery, can such a "zone plate" buy now, too.
Zone Plate and closure
The "zone plate" with their increasingly narrow translucent circles around the actual hole around is "brighter" than the pinhole. The exposure times are more in tenths of a second range. It is therefore advisable to work with closure. Suitable for this miniature cameras just fine. But of course, medium format cameras that can be attached instead of the appearance a "zone plate". In large format it is somewhat difficult, because here a separate closure required.
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