Compare Panasonic DG 25-50mm F1.7 vs Leica Tri-Elmar-M 16-18-21mm F4 vs Leica Summilux-M 21mm F1.4
Construction
Aperture Blades
9 circular aperture diaphragms
Colors
Black
Form Factor
Ultra Wide-Angle Zoom Lens
Ultra Wide-Angle Prime Lens
Image Size
Full-frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Micro Four Thirds mount
Leica M-mount
Leica M-mount
Material
metal barrel, metal mount
Optical Formula | Elements
16 elements
10 elements
10 elements
Optical Formula | Groups
11 groups
7 groups
8 groups
Optical Formula | Special Glass
1 aspherical lens, 3 ED lenses, 1 UHR lens groups
2 aspherical elements groups
2 aspherical elements5 anomolous dispersion elements groups
Dimensions
Filter Diameter
77 mm
Size | Diameter
87.6 mm
70 mm / 2.76 in
Size | Length
127.6 mm
66 mm / 2.60 in
Weight
654 g
580 g / 20.49 oz
Function
Angle Of View
47° ~ 24°
107.1° Diagonal | 96.7° Horizontal | 73.7° Vertical (wide) / 91.7° Diagonal | 81.2° Horizontal | 59.5° Vertical (tele)
91.7° Diagonal | 81.2° Horizontal | 59.5° Vertical
Aperture
F/1.7 ~ f/16
f/4 ~ f/22
f/1.4 ~ f/16
Autofocus
No
No
Focal Length
0.28 m / 0.92 ft @ 25mm, 0.31 m / 1.02 ft @ 50mm
16 mm ~ 21 mm
21 mm
Focal Length (35mm Equivalent)
50-100 mm
Focus Type
Internal
Extending front
Image Stabilization
No
No
Operating Temperature
-10°C ~ 40°C
Weather Resistance
Dust, moisture
No
Zoom Type
External zoom
Performance
Max Magnification
0.21x @ 50mm
0.03x
0.03x
Min Focus Distance
0.37 m
500 mm / 19.69 in
700 mm / 27.56 in
Production
Accessory
Lens hood included
Lens hood included
Debut
2021-07-08
2006-09-14
2008-09-15
Made In
Germany
Germany
Model Name
H-X2550
Reviews
Neofiliac score
61%
78%
Pros
- Unique zoom versatility for rangefinder
- Reaches 16mm, the widest for Leica M
- Very bright maximum aperture
- Gorgeous rendering
- Very sharp
Cons
- Dark maximum aperture
- Low maximum magnification
- Requires wide-angle viewfinder
- Low maximum magnification
- Lacks weather sealing
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