Wolfram|Alpha Technological World

Photography

Photographic Optics

do f-stop arithmetic
f-stop arithmetic 5.6
compute subject magnification
subject magnification 10m
compute depth of field for a photographic lens
depth of field f=1m
compute hyperfocal distance
hyperfocal distance, f-stop 8
compute field or angle of view
field of view angle of view
compute other parameters
numerical aperture D=30mm spot size f/8
compute your exposure value
exposure value

Photo Sizes

compute characteristics of a photo size
8"x10" photograph
specify pixel density
4" x 6" photo at 72 ppi
get properties of a photo size
nearest paper sizes for a 5"x7" photo
compare photo sizes
5" by 7" photo vs 8" by 10" photo