N°411318 · Family detail
SigmaZoom·CANON RF mount·2025
Sigma 17-40mm F/1.8 DC | A
Specifications01
MountCANON RF
Focal length17-40mm
Max aperturef/1.8
TypeZoom
Release year2025
Weight560 g
Min focus distance0.28 m
Max magnification0.2083
Aperture blades11
Optical elements17
Groups11
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings + Auto Exposure setting)
Lens hoodLH728-02 - Bayonet-type petal-shaped
TeleconvertersNot compatible
Production statusIn production
Summary02
Sigma 17-40mm F/1.8 DC is a wide-to-ultrawide zoom for APS-C cameras, offering a constant f/1.8 aperture for low-light and general-purpose shooting. Intended for landscape, street, and indoor use.
AI-assisted summary — verify against linked sourcesWhere can this lens be adapted?
The Canon RF mount has a flange distance of 20 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work
- Native lenses set the aperture, and often the focus, electronically. On a plain adapter they do not work. Use an electronic adapter made for this pair; for many pairs nobody makes one. Fully manual lenses are the exception.
- RF-S lenses cover APS-C only.
- Sony EAdapter · 2 mm
The camera mount (46.1 mm) is narrower than the lens mount (54 mm). A large rear element can darken the corners.
- Canon RFNative
- Nikon ZAdapter · 4 mm
- Fujifilm XAdapter · 2.3 mm
- Canon EF-MAdapter · 2 mm
No plain adapter reaches infinity focus on: L-Mount, Micro Four Thirds, Fujifilm G (GFX), Canon EF, Nikon F.
Sources03
thelensdb.comVisit ↗
Other Mounts03
No alternate mounts are indexed for this family yet.