Field of View

Focal lengths / APS-C (Canon)

25mm on APS-C (Canon)

Frames like 40mm on full frame: 48.1° across, 33.2° top to bottom.

Reference photo: Forest
A 40mm eq.
The scene as framed by 25mm APS-C (Canon)
A What 25mm APS-C (Canon) sees
A 25mm on APS-C (Canon)
Focal length25mm
Full-frame equivalent40mm
Horizontal48.1°
Vertical33.2°
Diagonal56.4°
SensorAPS-C (Canon) 22.3 × 14.9 mm
Crop factor×1.6
Aspect ratio3:2

Compare it with another setup →

Same framing on other formats

The focal length that matches 40mm full-frame equivalent on each sensor size (crop-factor convention, diagonal).

SensorFocal lengthClosest page
Medium format50.6mm50mm on Medium format
Full frame40mm40mm on Full frame
APS-C26.7mm27mm on APS-C
Micro Four Thirds20mm20mm on Micro Four Thirds
1-inch14.8mm—

Primes at 25mm for APS-C (Canon) (6)

LensFocalApertureMountYear
7Artisans 25mm f/0.95 Firefly (EF-M)25mmf/1Canon EF-M2021
7Artisans 25mm f/0.95 Firefly (RF)25mmf/1Canon RF2021
Laowa Argus 25mm f/0.95 CF APO (EF-M)25mmf/1Canon EF-M2022
Laowa Argus 25mm f/0.95 CF APO (RF)25mmf/1Canon RF2022
SG-image MF 25mm f/1.8 (EF-M)25mmf/1.8Canon EF-M2024
SG-image MF 25mm f/1.8 (RF)25mmf/1.8Canon RF2024
Zooms that reach 25mm (12)
LensFocalApertureMountYear
Canon EF-M 15-45mm f/3.5-6.3 IS STM15–45mmf/3.5–6.3Canon EF-M2015
Canon EF-M 18-150mm f/3.5-6.3 IS STM18–150mmf/3.5–6.3Canon EF-M2016
Canon EF-M 18-55mm f/3.5-5.6 IS STM18–55mmf/3.5–5.6Canon EF-M2012
Canon RF-S 14-30mm f/4-6.3 IS STM PZ14–30mmf/4–6.3Canon RF2025
Canon RF-S 18-45mm f/4.5-6.3 IS STM18–45mmf/4.5–6.3Canon RF2022
Canon RF-S 18-150mm f/3.5-6.3 IS STM18–150mmf/3.5–6.3Canon RF2022
Sigma 16-300mm f/3.5-6.7 DC OS | C (RF)16–300mmf/3.5–6.7Canon RF2025
Sigma 17-40mm f/1.8 DC | A (RF)17–40mmf/1.8Canon RF2025
Sigma 18-50mm f/2.8 DC DN | C (RF)18–50mmf/2.8Canon RF2024
Tamron 16-50mm f/2.8 A (RF)16–50mmf/2.8Canon RF2026
Tamron 17-70mm f/2.8 Di III-A VC RXD (RF)17–70mmf/2.8Canon RF2026
Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (RF)18–300mmf/3.5–6.3Canon RF2025