APS-C Focal Length Calculator

Enter a lens focal length to see its full-frame equivalent on an APS-C camera. The calculator is preset to compare the 1.5× crop used by Nikon, Sony and Fujifilm with Canon's 1.6× APS-C crop.

Compare 1.5× and 1.6× APS-C

Change any focal length or crop factor to compare the resulting field of view.

1.5x 35mm

1.6x 35mm

Example Image:

Focal Length

The bigger this number, the more "zoomed in" your photo will be:

Small numbers (like 24mm) = wide view, good for landscapes
Medium numbers (like 50mm) = normal view, like human eye
Big numbers (like 200mm) = zoomed in, good for far away things

Crop Factor

This depends on your camera's sensor size:

Full Frame cameras = 1x (no crop)
Most mirrorless/DSLR cameras = 1.5x or 1.6x
Micro Four Thirds = 2x

The bigger this number, the more "zoomed in" your photo will look compared to a full frame camera.

Results

Effective Focal Length: 52.5mm

FOV: 37.8° × 25.8°

🚶Normal (travel, documentary)

Focal Length

The bigger this number, the more "zoomed in" your photo will be:

Small numbers (like 24mm) = wide view, good for landscapes
Medium numbers (like 50mm) = normal view, like human eye
Big numbers (like 200mm) = zoomed in, good for far away things

Crop Factor

This depends on your camera's sensor size:

Full Frame cameras = 1x (no crop)
Most mirrorless/DSLR cameras = 1.5x or 1.6x
Micro Four Thirds = 2x

The bigger this number, the more "zoomed in" your photo will look compared to a full frame camera.

Results

Effective Focal Length: 56.0mm

FOV: 35.6° × 24.2°

🚶Normal (travel, documentary)

How the conversion works

Multiply the focal length printed on the lens by your camera's crop factor. Most Nikon, Sony and Fujifilm APS-C cameras use 1.5×, while Canon APS-C cameras use 1.6×.

The result is a full-frame-equivalent field of view, not a change to the lens itself. A 35mm lens remains a 35mm lens; the smaller sensor records a narrower portion of its image circle.

Lens focal length × APS-C crop factor = full-frame-equivalent focal length

Focal length conversion table

APS-C focal length equivalents for 1.5x and 1.6x crop factors
Lens focal length	Nikon/Sony/Fujifilm 1.5×	Canon 1.6×
16mm	24mm	25.6mm
24mm	36mm	38.4mm
35mm	52.5mm	56mm
50mm	75mm	80mm
85mm	127.5mm	136mm
200mm	300mm	320mm

Values are field-of-view equivalents relative to a full-frame camera. Decimal results are shown where the conversion is not a whole number.

Worked example: a 35mm lens on APS-C

A 35mm lens on a Nikon, Sony or Fujifilm APS-C body gives a field of view similar to 52.5mm on full frame (35 × 1.5). On a Canon APS-C body it is similar to 56mm (35 × 1.6). That small difference can matter when matching framing across camera systems.