Angle of View for a photographic lens based on image circle and focal length

Result is presented in degrees.

Solar UV Exposure Meter | complete project
Complete tutorial for building a device that allows you to make sun exposures with the same amount of UV radiation even at different times and atmospheric conditions. Useful for cyanotype, gum bichromat, salted paper and other historical photographic printing processes. […]
Ground Glass – do it yourself
If you ever gave up about a camera because of missing […]
Lens/subject/format – an online simulator
How it works: You enter the focal length of your lens, […]
Image circle from angle of view and focal length
Evaluates image circle diameter for a given angle of […]
Magnetic Stirrer
Complete and detailed tutorial for you to produce a magnetic stirrer. It is an invaluable aid for preparing solutions in analog photography, such as developers and fixers. Assembly is very simple and uses low cost components. […]
Minimum image circle for a given film format
Use this calculator to find out what is the minimum image circle your lens must provide in order to cover a certain film format. […]