Site Title

Compare Samyang 20mm F1.8 ED AS UMC vs Tokina atx-m 56mm F1.4 vs Tokina Opera 50mm F1.4

Reviews

Neo score
59%
68%
68%
Pros
  • Rather affordable
  • Bright maximum aperture
  • Comes with physical aperture ring
  • Bright maximum aperture
  • Weather-sealed
  • Superb image quality
  • Considerate lens hood with filter window
Cons
  • Lacks weather sealing
  • Not the highest grade of build
  • Very heavy for an f/1.4 standard lens

Price

Offers (incl. referral links)

Construction

Aperture Blades
7 blades
9 blades
9 blades
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Short Telephoto Prime Lens
Normal Prime Lens
Image Size
Full-Frame
APS-C
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring
Distance 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
Fujifilm X-mount, Sony E-mount
Canon EF-mount, Nikon F-mount
Motor
Stepper motor
Ring-type ultrasonic
Optical Formula | Elements
13 elements
10 elements
15 elements
Optical Formula | Groups
12 groups
9 groups
9 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Aspherical + low-dispersion elements, ELR coating groups

Dimensions

Filter Diameter
77 mm / 3.03 in
52 mm / 2.05 in
72 mm / 2.83 in
Size | Diameter
83 mm / 3.27 in
65 mm / 2.56 in
80 mm / 3.15 in
Size | Length
88 mm / 3.46 in
72 mm / 2.83 in
108 mm / 4.25 in
Weight
497 g / 17.56 oz
315 g / 11.13 oz
950 g / 33.57 oz

Function

Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
28.9° Diagonal | 24.2° Horizontal | 16.3° Vertical
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
Aperture
f/1.8 ~ f/22
f/1.4 ~ f/16
f/1.4 ~ f/16
Autofocus
No
Yes
Crop Factor
1.5
Focal Length
20 mm
56 mm
50 mm
Focal Length (35mm Equivalent)
84.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Yes

Performance

Max Magnification
0.1x
Min Focus Distance
200 mm / 7.87 in
600 mm / 23.62 in
400 mm / 15.75 in

Production

Accessory
Lens hood included
Lens Hood: BH-525 (supplied)
Lens hood included
Debut
2016-08-08
2021-07-16
2018-02-28
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