Focal Length Equivalence Table
Focal Lengths as given are nearly equivalent, and may represent
available lenses.
| Film Size | 35mm | 120 | 2"x3" | 4"x5"
|
| Image Format | 24x36mm | 56x68mm | 2"x3" | 4"x5"
|
| Film Type | roll | roll | sheet | sheet
|
Fisheye
|
| Focal Length | 18mm | 37mm | ---- | ----
|
Ex. Wide Angle
|
| Focal Length | 20mm | | ---- | 65mm
|
| | 24mm | 50mm | 47mm | ----
|
| | 28mm | 65mm | 53mm | 90mm (3-1/2")
|
Moderate Wide Angle
|
| Focal Length |
| | | 100mm (4")
|
| | 35mm | 75mm | 65mm | 127mm (5")
|
| | 40mm | | 75mm | 135mm (5-1/4")
|
Normal
|
| Focal Length | 50mm | 110mm | 100mm | 152mm (6")
|
| | 65mm | 127mm | ---- | 203mm (8")
|
Moderate Telephoto
|
| Focal Length |
85mm | 150mm | ---- | 250mm (10")
|
| | | | | 270mm
|
Medium Telephoto
|
| Focal Length |
100mm | 210mm | 202mm | ----
|
| | 135mm | 250mm | ---- | 380mm (15")
|
Long Telephoto
|
| Focal Length |
250mm | 500mm | ---- | ----
|
| | 500mm | ---- | ---- | ----
|