For World Wide Pinhole Photography Day, I made exposures on film at the Peabody Estate, and at a nearby train station. My last submission was in 2005 - of a moving freight train.
The following images show the setup. Once the film is developed, I'll post several images, and provide a link to the one selected for the WPPD website.
Zone Plate on Hasselblad body cap.
I was using Kodak TMax 400 film. The zone plate, pictured above, has an effective f/stop of 65. Various body caps are available at the Pinhole Resource.
Luna-Pro
It's always a good idea to have a meter available. This older Luna-Pro S has a scale that includes apertures to f/128. The math is quite simple, it's just handy to have a quick reference. With the T-Max 400 film, an aperture of f/65, the exposure for this sunny day was in the range of 1/30th of a second. The film has a wide exposure latitude, so there is no need to get too hung-up about exposure times - just get close.
Since there is no conventional shutter with this setup, you simply flop the Hasselblad's curtains open and shut. On a sunny day, I simply trip the curtains, and release them as soon as I can. I'll post a video soon to show this process.
Hasselblad with zone plate for exposure
The view through the zone plate is dim. There is no focusing - just frame your composition.
Zone Plate replaced with 40mm Distagon
After the exposures with the zone plate, I used a conventional lens to provide a comparison of the images. This lens is slightly wider than the plate's field of view.
Secondary low angle setup
Exposures were made from this lower perspective, in addition to a few other views. I'll post the variations when the film gets back.
