Sensor format

APS-C

The most common interchangeable-lens format: a 1.5× crop factor that balances size, cost and image quality.

23.5×15.6 mm

Dimensions

1.53×

Crop factor

367 mm²

Area (42% of FF)

-1.2

Stops of light vs full frame

3:2

Aspect ratio

19.6 µm

Circle of confusion

About APS-C#

The most common interchangeable-lens format: a 1.5× crop factor that balances size, cost and image quality.

Typical cameras: Fujifilm X-T5, Sony a6700, Nikon Z50, Pentax K-3 III.

Compared to other formats#

Lens needed for the same framing#

Full-frame focal length	Equivalent on APS-C	Horizontal angle
14 mm	9.1 mm	104.3°
24 mm	15.6 mm	73.8°
35 mm	22.8 mm	54.5°
50 mm	32.6 mm	39.6°
85 mm	55.4 mm	23.9°
135 mm	88.0 mm	15.2°
200 mm	130.4 mm	10.3°

Equivalent aperture for depth of field#

On APS-C	Full-frame equivalent
f/1.4	f/2.1
f/2	f/3.1
f/2.8	f/4.3
f/4	f/6.1
f/5.6	f/8.6
f/8	f/12.3

Cameras with a APS-C sensor#

227 cameras in our database.

Depth-of-field tables for this format#

24 mm f/1.8 24 mm f/2.8 24 mm f/8 35 mm f/1.8 35 mm f/2.8 35 mm f/8 50 mm f/1.8 50 mm f/2.8 50 mm f/8 85 mm f/1.8 85 mm f/2.8 85 mm f/8

Frequently asked questions#

What is the crop factor of APS-C?

1.53× (diagonal 28.2 mm vs 43.3 mm for full frame).

How big is a APS-C sensor?

23.5 × 15.6 mm, an area of 367 mm².

Is APS-C good in low light?

At the same exposure it gathers 1.2 stops less total light than full frame, so expect roughly that much more visible noise at equal print size. Modern processing narrows but doesn't erase the gap.

Last updated October 03, 2026 · How we calculate · Sources