Use the calculator to generate a zone plate and save the file on your computer
Use a photo editor to invert the image (black to white) and save in a lab friendly file type(tiff). Print the image directly to film. Some photographic labs provide this service.
Scale the zone plate by entering a multiplier for the scale value, save and print the zoneplate, then take a picture of the print.
Multiply the factor the image was scaled up by the focal length of the camera lens.
For example, scale up a zone plate up by a factor of 400 in a photo editor and print it. Then, for a camera with a 70mm lens attached, place the print in front of the camera at a distance of 400 X 70mm = 2800mm.
Option 3: Print the zone plate on a transparency using a laser printer.