Site Title

Compare Samyang 20mm F1.8 ED AS UMC vs Zeiss Loxia 21mm F2.8 vs Zeiss Milvus 25mm F1.4

Reviews

Neo score
59%
86%
78%
Pros
  • Rather affordable
  • Weather-sealed
  • Smooth focus ring
  • Excellent image quality
  • Declickable aperture ring
  • Bright maximum aperture
  • Weather-sealed
  • Excellent image quality
  • F-mount with physical aperture ring
Cons
  • Lacks weather sealing
  • Not the highest grade of build
  • Some distortion
  • Physically large
  • On the heavy side

Price

Offers (incl. referral links)

Construction

Aperture Blades
7 blades
Colors
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Wide-Angle Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring, Distance scale
Distance scale, DoF scale
Lens Mount
Canon EF-mount, Canon EF-M-mount, Fujifilm X-mount, Micro Four Thirds-mount, Nikon F-mount, Pentax K-mount, Samsung NX-mount, Sony A-mount, Sony E-mount
Sony E-mount
Canon EF-mount, Nikon F-mount
Material
Metal
Metal
Optical Formula | Elements
13 elements
11 elements
16 elements
Optical Formula | Groups
12 groups
9 groups
13 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Aspheric and APD elements + T* coating groups

Dimensions

Filter Diameter
77 mm / 3.03 in
52 mm / 2.05 in
82 mm / 3.23 in
Size | Diameter
83 mm / 3.27 in
62 mm / 2.44 in
95 mm / 3.74 in
Size | Length
88 mm / 3.46 in
72 mm / 2.83 in
123 mm / 4.84 in
Weight
497 g / 17.56 oz
394 g / 13.92 oz
1225 g / 43.29 oz

Function

Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
91.7° Diagonal | 81.2° Horizontal | 59.5° Vertical
81.8° Diagonal | 71.5° Horizontal | 51.3° Vertical
Aperture
f/1.8 ~ f/22
f/2.8 ~ f/22
f/1.4 ~ f/16
Autofocus
No
No
No
Focal Length
20 mm
21 mm
25 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Yes
Yes

Performance

Max Magnification
0.13
0.22
Min Focus Distance
200 mm / 7.87 in
250 mm / 9.84 in
250 mm / 9.84 in

Production

Accessory
Lens hood included
Lens hood included
Debut
2016-08-08
2015-10-12
2017-10-18
Made In
Japan
Japan
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