DSLR Crop Factor conversion chart

Most 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
1.3X1.5X1.6X2.0X
8mm10.4mm12mm12.8mm16mm
10mm13mm15mm16mm20mm
14mm18.2mm21mm22.4mm28mm
17mm22.1mm25.5mm27.2mm34mm
20mm26mm30mm32mm40mm
28mm36.4mm42mm44.8mm56mm
35mm45.5mm52.5mm56mm70mm
50mm65mm75mm80mm100mm
85mm110.5mm127.5mm136mm170mm
105mm136.5mm157.5mm168mm210mm
135mm175.5mm202.5mm216mm270mm
200mm260mm300mm320mm400mm
400mm520mm600mm640mm800mm
500mm650mm750mm800mm1000mm
600mm780mm900mm960mm1200mm

* 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.

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