Calculators
Pinhole Calculators [see also pinhole math]
A PALM version that ONLY WORKS WITH OLDER PalmOS 3 - 3.5 PDAs.
Windows Calculators written in Borland's Delphi [0.4MB]
Versions of the above simple web calculator written in REALBasic
Windows [2.6MB]
Linux [2MB]
MacOS [does Classic and OSX] [2.5MB]
Zoneplate Calculator [see also zoneplate math]
Using a current 25x image for a new focal length
Hyperfocal Calculator [see also hyperfocal math]