Field of View

Focal lengths / APS-C

28mm on APS-C

Frames like 42mm on full frame: 45.5° across, 31.1° top to bottom.

Reference photo: Forest
A 42mm eq.
The scene as framed by 28mm APS-C
A What 28mm APS-C sees
A 28mm on APS-C
Focal length28mm
Full-frame equivalent42mm
Horizontal45.5°
Vertical31.1°
Diagonal53.5°
SensorAPS-C 23.5 × 15.6 mm
Crop factor×1.5
Aspect ratio3:2

Compare it with another setup →

Same framing on other formats

The focal length that matches 42mm full-frame equivalent on each sensor size (crop-factor convention, diagonal).

SensorFocal lengthClosest page
Medium format53.2mm55mm on Medium format
Full frame42mm40mm on Full frame
APS-C (Canon)26.3mm25mm on APS-C (Canon)
Micro Four Thirds21mm20mm on Micro Four Thirds
1-inch15.6mm—

Primes at 28mm for APS-C (3)

LensFocalApertureMountYear
Meike 28mm f/2.8 (E)28mmf/2.8Sony E2016
Meike 28mm f/2.8 (MFT)28mmf/2.8Micro Four Thirds2016
Meike 28mm f/2.8 (X)28mmf/2.8Fujifilm X2016
Zooms that reach 28mm (46)
LensFocalApertureMountYear
Fujifilm XC 13-33mm f/3.5-6.3 OIS13–33mmf/3.5–6.3Fujifilm X2025
Fujifilm XC 15-45mm f/3.5-5.6 OIS PZ15–45mmf/3.5–5.6Fujifilm X2018
Fujifilm XF 16-50mm f/2.8-4.8 R LM WR16–50mmf/2.8–4.8Fujifilm X2024
Fujifilm XF 16-55mm f/2.8 R LM WR16–55mmf/2.8Fujifilm X2015
Fujifilm XF 16-55mm f/2.8 R LM WR II16–55mmf/2.8Fujifilm X2024
Fujifilm XF 16-80mm f/4 R OIS WR16–80mmf/4Fujifilm X2019
Fujifilm XC 16-50mm f/3.5-5.6 OIS II16–50mmf/3.5–5.6Fujifilm X2015
Fujifilm XF 18-55mm f/2.8-4 R LM OIS18–55mmf/2.8–4Fujifilm X2012
Fujifilm XF 18-120mm f/4 LM PZ WR18–120mmf/4Fujifilm X2022
Fujifilm XF 18-135mm f/3.5-5.6 R LM OIS WR18–135mmf/3.5–5.6Fujifilm X2014
Leica Vario-Elmar-TL 18-56mm f/3.5-5.6 ASPH.18–56mmf/3.5–5.6L-Mount2014
Nikon Z DX 12-28mm f/3.5-5.6 PZ VR12–28mmf/3.5–5.6Nikon Z2023
Nikon Z DX 16-50mm f/3.5-6.3 VR16–50mmf/3.5–6.3Nikon Z2019
Nikon Z DX 16-50mm f/2.8 VR16–50mmf/2.8Nikon Z2025
Nikon Z DX 18-140mm f/3.5-6.3 VR18–140mmf/3.5–6.3Nikon Z2021
Sigma 16-300mm f/3.5-6.7 DC OS | C (E)16–300mmf/3.5–6.7Sony E2025
Sigma 17-40mm f/1.8 DC | A (E)17–40mmf/1.8Sony E2025
Sigma 18-50mm f/2.8 DC DN | C (E)18–50mmf/2.8Sony E2021
Sigma 16-300mm f/3.5-6.7 DC OS | C (L)16–300mmf/3.5–6.7L-Mount2025
Sigma 17-40mm f/1.8 DC | A (L)17–40mmf/1.8L-Mount2025
Sigma 18-50mm f/2.8 DC DN | C (L)18–50mmf/2.8L-Mount2021
Sigma 16-300mm f/3.5-6.7 DC OS | C (X)16–300mmf/3.5–6.7Fujifilm X2025
Sigma 17-40mm f/1.8 DC | A (X)17–40mmf/1.8Fujifilm X2025
Sigma 18-50mm f/2.8 DC DN | C (X)18–50mmf/2.8Fujifilm X2022
Sigma 16-300mm f/3.5-6.7 DC OS | C (Z)16–300mmf/3.5–6.7Nikon Z2026
Sony E PZ 16-50mm f/3.5-5.6 OSS II16–50mmf/3.5–5.6Sony E2024
Sony E PZ 16-50mm f/3.5-5.6 OSS16–50mmf/3.5–5.6Sony E2012
Sony E 16-55mm f/2.8 G16–55mmf/2.8Sony E2019
Sony Vario-Tessar T* E 16-70mm f/4 ZA OSS16–70mmf/4Sony E2013
Sony E PZ 18-105mm f/4 G OSS18–105mmf/4Sony E2013
Sony E PZ 18-110mm f/4 G OSS18–110mmf/4Sony E2016
Sony E 18-135mm f/3.5-5.6 OSS18–135mmf/3.5–5.6Sony E2018
Sony E 18-55mm f/3.5-5.6 OSS18–55mmf/3.5–5.6Sony E2010
Sony E 18-200mm f/3.5-6.3 OSS18–200mmf/3.5–6.3Sony E2010
Sony E 18-200mm f/3.5-6.3 OSS LE18–200mmf/3.5–6.3Sony E2012
Sony E PZ 18-200mm f/3.5-6.3 OSS18–200mmf/3.5–6.3Sony E2012
Tamron 16-50mm f/2.8 A (E)16–50mmf/2.8Sony E2026
Tamron 17-70mm f/2.8 Di III-A VC RXD (E)17–70mmf/2.8Sony E2020
Tamron 18-200mm f/3.5-6.3 Di III VC (E)18–200mmf/3.5–6.3Sony E2011
Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (E)18–300mmf/3.5–6.3Sony E2021
Tamron 16-50mm f/2.8 A (X)16–50mmf/2.8Fujifilm X2026
Tamron 17-70mm f/2.8 Di III-A VC RXD (X)17–70mmf/2.8Fujifilm X2022
Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (X)18–300mmf/3.5–6.3Fujifilm X2021
Tamron 16-50mm f/2.8 A (Z)16–50mmf/2.8Nikon Z2026
Tamron 17-70mm f/2.8 Di III-A VC RXD (Z)17–70mmf/2.8Nikon Z2026
Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Z)18–300mmf/3.5–6.3Nikon Z2025