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Discussion in 'Pinhole Photography' started by Jim Moore, Aug 30, 2004.
Could someone please tell me what the difference between a Pinhole and a Zone Plate is?
about 1/2way down this page you will see a zone plate.
it looks like a "bullseye" , and can give you a beautiful glowing image.
if you have a lubitel 166 ... ( the tlr lomo )
the zone plate will fit perfectly in front of the shutter.
pinholeresource sells zone plates and laser - drilled pinholes
sorry i didn't really answer your question ..
i was going for the picture is worth 1000 words
Ed Sukach's links to diffraction related articles explains things very well in this thread.
Practically, a zone plate is faster than a pinhole, but less sharp. Also, the zone plate imparts a kind of "glow" to highlights. A zone plate has an ideal focal length, thus can be focused for a particular subject distance, but focusing is not absolutely necessary to produce a usable image.
Some examples of my zone plate images: http://www.ellingerphoto.com