Leica L Mount - Technology News Online

Sigma has launched three I Series Contemporary primes for the Leica L mount in India: the 20mm F2 Contemporary DG II (49B969), the 24mm f/2 DG Contemporary (193969) and the 50mm f/2 DG Contemporary (31S969). The trio price starts at Rs.59,954 (Lowest Price on August 28, 2026) for the 24mm f/2 DG Contemporary (193969) and the 50mm f/2 DG Contemporary (31S969), rising to Rs.67,586 for the 20mm F2 Contemporary DG II (49B969). The MRP price is Rs.65,200 for the 24mm and the 50mm, and Rs.73,500 for the 20mm.

Key specs highlights include a constant f/2 maximum aperture across all three focal lengths, full-frame coverage on the L mount, an all-metal barrel with a manual aperture ring, and weights of 350g to 370g.

Colour differs by lens. The 20mm F2 Contemporary DG II (49B969) and the 24mm f/2 DG Contemporary (193969) ship in black, while the 50mm f/2 DG Contemporary (31S969) ships in silver.

Pricing & Availability

Model	Model Number	MRP	Launch Price	Link
Sigma 20mm F2 Contemporary DG II (Black) I Series, L Mount	49B969	Rs.73,500	Rs.67,586	Amazon India↗
Sigma 24mm f/2 DG Contemporary (L-Mount, Black)	193969	Rs.65,200	Rs.59,954	Amazon India↗
Sigma 50mm f/2 DG Contemporary (L-Mount, Silver)	31S969	Rs.65,200	Rs.59,954	Amazon India↗

What We Like About the Sigma I Series L-Mount Primes

f/2 maximum aperture on all three lenses: the same exposure and depth-of-field behaviour across 20mm, 24mm and 50mm, so switching focal lengths does not change the working aperture
350g to 370g weights: the 20mm 49B969 is 370g, the 24mm 193969 is 360g and the 50mm 31S969 is 350g, close enough that a two or three lens kit stays within a similar carrying weight
All-metal barrel with knurled focus and aperture rings: aperture can be set on the lens itself rather than through the camera body
Rounded 9-blade diaphragm on the 24mm and 50mm: keeps out-of-focus highlights circular when stopped down
Dust and splash-resistant construction with a brass bayonet mount on the 24mm 193969 and 50mm 31S969

Sigma 20mm F2 Contemporary DG II (49B969)

The widest of the three, the 20mm F2 Contemporary DG II (49B969) is a full-frame prime with a fixed 20mm focal length and an f/2 maximum aperture. Focus is autofocus, and the optical design is a prime rather than a zoom.

Sigma states the lens weighs 370g and measures 72.4mm in length on the L mount, and describes it as suited to landscapes, wide-angle portraits, weddings, interiors and astrophotography, the last owing to what the company calls very well-controlled sagittal coma flare. According to Sigma this is the fourth I series lens built around an f/2 aperture, joining the 24mm, 35mm and 65mm.

Sigma 24mm f/2 DG Contemporary (193969)

The 24mm f/2 DG Contemporary (193969) covers a full-frame wide angle at a fixed 24mm, with an aperture range of f/2 to f/22. Sigma lists the barrel at approximately 2.8 x 2.8 inches and the weight at just under 13 oz, which works out to the 360g figure on the listing.

Optically, the design uses three low dispersion elements and two aspherical elements, with a Super Multi-Layer Coating applied to control flare and reflections. A stepping AF motor drives an internal focusing design, so the front element does not rotate or extend during focus. The diaphragm has nine rounded blades.

Construction is all-metal with a brass bayonet mount, and the lens carries a dust and splash-resistant design. Sigma names landscape, street, cityscape and documentary work as the intended uses, and lists astrophotography as a fit for the f/2 aperture.

Sigma 50mm f/2 DG Contemporary (31S969)

At the long end of the set, the 50mm f/2 DG Contemporary (31S969) is a standard prime running from f/2 to f/22. Sigma gives the dimensions as roughly 2.75 x 2.75 inches and the weight as a little over 12 oz, matching the 350g listing figure. This is the silver version.

The optical formula here uses one SLD element and three aspherical elements, again with a Super Multi-Layer Coating. Focusing is internal and driven by a stepping AF motor, which Sigma says suits both stills and video. The nine-blade rounded diaphragm carries over from the rest of the line.

Like the 24mm, the 50mm 31S969 has an all-metal barrel, a brass bayonet mount and dust and splash-resistant construction. Sigma positions the focal length for portraiture, street scenes and general shooting.

Sigma 20mm 49B969 vs 24mm 193969 vs 50mm 31S969 Comparison

Feature	20mm F2 DG II (49B969)	24mm f/2 DG (193969)	50mm f/2 DG (31S969)
Focal Length	20mm (fixed)	24mm (fixed)	50mm (fixed)
Maximum Aperture	f/2	f/2	f/2
Minimum Aperture	f/22	f/22	f/22
Lens Design	Prime	Prime	Prime
Mount	Leica L	Leica L	Leica L
Weight	370g	360g	350g
Colour	Black	Black	Silver
Diaphragm Blades	Not listed	9, rounded	9, rounded
Box Contents	Lens	Lens, hood, front and rear caps	Lens, hood, front and rear caps
Launch Price	Rs.67,586	Rs.59,954	Rs.59,954