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Panasonic Lumix S 20mm f/2.5 vs Sigma 17-40mm F1.8 DC | Art Lens

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Optics
Focal Length
20mm
17-40mm
Max Aperture
f/2.5
f/1.8
Min Aperture
f/22
f/16
Elements / Groups
11 / 9
17 / 11
Special Elements
3 Aspherical, 3 ED elements, Fluorine coating
4 FLD, 4 SLD, 2 aspherical
Coatings
Fluorine front coating
Super Multi-Layer coating + water/oil-repellent front coating
Diaphragm Blades
7
11
Max Magnification
0.15x
0.21x
Zoom Ratio
-
2.4x
Focus
Min Focus Dist.
18cm
28cm
Autofocus
AF Motor Type
STM
HLA motor
Focus Method
internal
internal
Full-time Manual
Distance Scale
Focus Limiter
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Physical
Lens Mount
Leica L
Leica L
Weight
142 g
535 g
Dimensions (D x L)
69 x 41 mm
73 x 116 mm
Filter Thread
62 mm
67 mm
Weather Sealing
Hood Supplied
Tripod Collar
Features
Image Stabilization
Power Zoom
Zoom Lock
Aperture Ring
Breathing Correction
Parfocal
Custom Buttons
1
2
Color
Black
Black
Zoom Method
-
Internal
General
Launch Price
USD 499
USD 919
Announce Date
Sep 16, 2026
Jun 17, 2025
Sensor Format
Full Frame
APS-C