Compare Sigma 20mm F1.4 DG HSM vs Leica TL 23mm F2
Construction
Aperture Blades
9 blades, Rounded blades
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Wide-Angle Prime Lens
Image Size
Full-Frame
APS-C
Lens Barrel
Distance scale
Lens Mount
Canon EF-mount, Nikon F-mount, Sigma SA-mount, Sony E-mount, Leica L-mount
Leica L-mount
Motor
Ring-type ultrasonic
Stepper motor
Optical Formula | Elements
15 elements
9 elements
Optical Formula | Groups
11 groups
6 groups
Optical Formula | Special Glass
Two FLD, five SLD elements + Super Multi-Layer coating groups
2 Aspheric surfaces groups
Dimensions
Filter Diameter
52 mm / 2.05 in
Size | Diameter
91 mm / 3.58 in
63 mm / 2.48 in
Size | Length
130 mm / 5.12 in
37 mm / 1.46 in
Weight
950 g / 33.57 oz
154 g / 5.44 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
64.2° Diagonal | 55.1° Horizontal | 38.4° Vertical
Aperture
f/1.4 ~ f/16
f/2 ~ f/16
Autofocus
Yes
Yes
Crop Factor
1.5
Focal Length
20 mm
23 mm
Focal Length (35mm Equivalent)
34.5 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
Weather Resistance
No
Performance
Max Magnification
0.14x
Min Focus Distance
300 mm / 11.81 in
300 mm / 11.81 in
Production
Accessory
Lens hood included
Lens hood included
Debut
2015-10-16
2014-04-24
Made In
Japan
Germany
Reviews
Neofiliac score
55%
86%
Pros
- High level of resolution
- Bright maximum aperture
- Compact and lightweight
- Beautiful construction
Cons
- Large and heavy
- Lacks front filter thread
- Lacks weather sealing
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