I would use a one element lens, such as the ones from Edmund
Scientific, as long as it is close to the same focal length, as a
viewing lens. That is, put it on a lensboard and frame your image on
the groundglass. Then change it to your zoneplate and shoot.
Actually you might try stacking a couple of cheap reading glasses
lenses to achieve the approximate focal length, and if they are a
little off, the softness might resemble the zoneplate image. Reading
glasses are available here for a dollar a pair. This is a good way to
frame pinhole cameras shots too.
Other possibilities:
- masking down a cheap door-peephole viewer till it matches your
ZP angle
- using the viewfinder off a disposable camera, especially a
slight wide-angle
- the discontinued Kodak DISC cameras had very neat
viewfinders
- using a cardboard frame with a string to measure the correct
distance
- or best yet, use ZEN viewfinder by imagining the camera's point
of view. Don't laugh, I do that all the time.
Good luck.
Sam Wang
Hi all:
Where I can buy a viewfinder (cheap if possible) for my portable 5 x 7' Zone Plate camera (under construction)?
Zone Plate Focal Length (mm) = 180
It is possible build it?. �How?.
Thanks.
Best regards,
Manuel Estebanez
Spain
