What is a

Crop Factor?

Quick-fire guide to understanding your camera’s crop/form factor and how it affects your photos.

arrows downward crop crop factor

All digital cameras that don’t have a full-frame sensor are referred to as cropped sensors. It means they are smaller than a full sized one. This difference in size will reflect a difference in your photographs.

The size of your camera’s sensor will change the focal length of any lens you use. For example, a 50mm lens will never be truly 50mm on a cropped sensor.

FIND YOUR CAMERA’S FORM FACTOR

Common Form Factors

1.29x crop factor
1.52x crop factor
1.61x crop factor
2.0x crop factor
2.72x crop factor

APS-H Sensors (Canon)

APS-C Sensors (Other Brands)

APS-C Sensors (Canon)

Micro 4/3rd Cameras

Compact Cameras

How to work out your lenses true focal length

Multiply

FOCAL LENGTH

X

FORM FACTOR

SEE IT IN PRACTICE

Current Focal Length

Actual Focal Length

pink arrow 50mm crop
pink arrow 85mm crop
pink arrow 100mm crop

X

X

X

=

=

=

64.5mm

129.2mm

200mm

Same goes for zoom lenses

18-55mm on APS-C 

actually, gives you a 

 

27.36-83.6mm lens

DISCOVER MORE AT

What is a Crop Factor?

Quick-fire guide to understanding your camera’s crop factor and how it affects your photos.

arrows downward crop

All cameras that don’t have a full-frame sensor are referred to as cropped sensors. It means they are smaller than a full sized one.

The crop / form factor of your camera will change the focal length of any lens. A 50mm lens will never be truly 50mm on a cropped sensor.

FIND YOUR CAMERA’S FORM FACTOR

Common Form Factors

APS-H Sensors (Canon)

APS-C Sensors 

(Sony/Nikon/Pentax/Fuji/Samsung)

APS-C Sensors (Canon)

Micro 4/3rds Cameras

Compact Cameras

How to work our your lenses true focal length

Multiply

FOCAL LENGTH

X

FORM FACTOR

SEE IT IN PRACTICE

x = 64.5mm

x = 129.2mm

x = 200mm

Same goes for zoom lenses

18-55mm on APS-C 

actually, gives you a 

 

27.36-83.6mm lens

  

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