Sigma 17-40mm F1.8 DC, Art, L-Mount

Sigma 17-40mm F1.8 DC | Art | L-Mount

This lens brings Sigma's renowned Art series image quality to APS-C mirrorless systems, combining the sharpness of a prime lens with the versatility of a zoom. A constant f/1.8 aperture throughout the range ensures excellent low-light performance and shallow depth of field control. Covering a focal length of approximately 25.5-60mm, it is ideal for landscapes, portraits and video.

Main features

• Constant maximum aperture of f/1.8 throughout the zoom range


• Focal length range from wide to normal (25.5-60mm full frame equivalent)


• Optical design with 17 elements in 11 groups, including four aspherical and four SLD elements


• 11-blade circular diaphragm for smooth, pleasing bokeh


• Internal zoom design keeps lens length constant during zooming


• Reduced focus 'hesitation' when filming


• High-speed linear autofocus motor with manual control


• Two customizable AFL (autofocus lock) buttons


• Water and oil resistant front element


• Dust and splash-proof connector design

Technical characteristics

• Focal length: 17-40 mm (APS-C format)


• Maximum aperture: f/1.8


• Minimum aperture: f/16


• Lens mount: L-type mount


• Minimum focusing distance: 28 cm (11 in.)


• Maximum magnification: 1:4.8 (approx. 0.21×)


• Optical construction: 17 elements in 11 groups


• Diaphragm leaflets: 11, rounded


• Filter size: 67 mm


• Dimensions: approximately 72.9 mm diameter × 118.2 mm length


• Weight: approximately 530 g (18.7 oz)


• Image coverage: APS-C format only

What's included in the kit?

• Sigma 17-40mm f/1.8 DC Art Lens (L-Mount)


• Sigma LCF-67 IV Lens Cap (67 mm)


• Sigma LCR III Rear Lens Cap for L-Mount


• Lens hood


• Carrying bag