the ratio of the width to the height of an image
Common aspect ratios in still photography
- 1:1 - some 120mm film cameras, Holga/Diana, Instagram
- 3:2 - 35mm film (36mm x 24mm), most digital SLRs
- 4:3 - compact cameras, four thirds and medium format (645), old polaroid prints
Common display aspect ratios
- 3:2 - standard computer monitors and televisions
- 16:9 - wide screen
Common print aspect ratios
- 3:2 - 4 x 6, 8 x 12, 20 x 30cm (A4)
- 4:3 - 4.5 x 6", 13.5 x 18cm (6D)
- 10:7 - 3.5 x 5", 9 x 13cm
- 7:5 - 5" x 7", 13 x 18cm
- 5:4 - 8 x 10", 20 x 25cm
- 14:11 - 11 x 14", 28 x 36cm