Pinhole-Zone Plate Adapter for Copal 0

[europanorama]

Since Zeroimage has sold out their Pinhole-Zone Plate Adapter for Copal 0 we will make one.
his zone plate set is special designed for use with our Copal adaptor, simply cut along the edge of the zone plate and it will automatically be centered in the pocket of the copal adaptor.
http://www.zeroimage.com/web2003/ProductPage/Accessories2003/CopalAdaptorPhoto/CopalAdaptor2005.jpg
http://shop.silverprint.co.uk/media/STOCKIMG/001B44DA.JPG
as we can see there is a base-adapter which will hold the plate and second ontop which will hold it.
I simply dont understand how its working. is there a cavity in the base ring?
shinkpinhole/photo has a 90mm copal 0-set of pinhole, zoneplate and zonesieve-
maybe one can attach the zeroimage-plates there.
Rafcamera has a copal-0-ring which can drilled as copal 0 to copal 1.
i would get the 75mm pinhole and zoneplate sets from zeroimage.
The zoneplate set is with 90,135,150,180, 240 and 300mm.only the adapter is not available.
aupremier plan has single pinholes

 

[redrockcoulee]

We simply mounted the pinholes and zoneplate onto black mat board, attached a small piece of ribbon and insert it into a Copa 0 shutter. On each mat board I made a label with the focal length and f stop and for many I put two focal length a f stops as many authors provide different results for any particular aperture size.

 

[europanorama]

I want to use the 18°-shutter from china. its 20mm diameter so 18mm plate can be inserted. better getting the 4x5 point and shoot camera all included 250 usd) instead of shutter only for 80usd. shutter makes sense for zoneplate/Zonesieve.
I could use prontor press timer-cable. 2-32 sec timer