DSLR accessories

DSLR Crop Factor conversion chart

Written by Digicamhelp Editor

Our focal length multiplier conversion chart lists the effective focal lengths of lenses by the crop factor of digital single lens reflex cameras.

Crop factorsMost sensors used in digital single lens reflex cameras have a smaller area than the surface of 35mm film but focal lengths are still expressed in the 35mm format. As a result, each camera’s effective focal length will be different than the one listed on a lens.

The effective focal length is determined by multiplying the actual focal length of a lens by a camera’s crop factor, also know as Focal Length Multiplier and Field of View Crop Factor.

Before buying a lens, it’s important to know the crop factor of your DSLR.*

Our conversion chart shows the effective focal length of a lens by crop factor.

Crop factor/Focal length multiplier conversion chart
1.3X 1.5X 1.6X 2.0X
8mm 10.4mm 12mm 12.8mm 16mm
10mm 13mm 15mm 16mm 20mm
14mm 18.2mm 21mm 22.4mm 28mm
17mm 22.1mm 25.5mm 27.2mm 34mm
20mm 26mm 30mm 32mm 40mm
28mm 36.4mm 42mm 44.8mm 56mm
35mm 45.5mm 52.5mm 56mm 70mm
50mm 65mm 75mm 80mm 100mm
85mm 110.5mm 127.5mm 136mm 170mm
105mm 136.5mm 157.5mm 168mm 210mm
135mm 175.5mm 202.5mm 216mm 270mm
200mm 260mm 300mm 320mm 400mm
400mm 520mm 600mm 640mm 800mm
500mm 650mm 750mm 800mm 1000mm
600mm 780mm 900mm 960mm 1200mm

* The crop factor should be listed in the specifications section of a camera manual. Entry-level cameras made by Canon usually have a crop factor of 1.6, though some higher-end models have 1.3, or none at all. Nikon, Sony and Pentax crop cameras usually have a multiplier of 1.5. Four-thirds systems such as those made by Olympus and Panasonic have a multiplier of 2.