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

Result is presented in degrees.

Build your 4×5″ camera back
Tutorial shows step-by-step and constructive details to make a large format camera back to work with standard film holders, sizes 4x5" and 9x12 cm. […]
Respooling 127 film from 120
Complete tutorial about how to cut 120 to 127 film format and spool it into a 127 film reel. Materials, devices, video and measurements, everything you need to know to use again your cute Baby 127 camera. […]
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. […]
Enlarger head using RGB LEDs – complete project
Complete project for the construction of a photographic amplifier head using RGB LEDs. Includes your timer / mixer. It allows the use of multi-contrast papers and can be fixed on a 4x5 camera for use as an amplifier. […]
Enlarger head using LEDs
Article presents project to build a black and white photo enlarger head, with timer, using LEDs and Arduino platform. The result is high power and excellent contrast control for black and white work. […]
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. […]