crop factor
What is a
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
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
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.
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
What Others Are Reading
iPhotography Course not only teaches you all the standard technical expertise, settings, skills, and special effects with your camera – but we also show you how to use these skills to develop your own individual style as a photographer.
100,000+
iPhotographers
187
Countries
Learn the iPhotography™ Way
Learn the iPhotography™ Way
