Compare Laowa 20mm F4 Zero-D Shift vs PENTAX-D FA 15-30mm F2.8
Construction
Aperture Blades
14 blades
9 blades
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Zoom Lens
Image Size
Medium Format (44x33)
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Distance scale
Lens Mount
Canon EF-mount, Canon RF-mount, Fujifilm G-mount, Leica L-mount, Nikon F-mount, Nikon Z-mount, Pentax K-mount, Sony E-mount
Pentax K-mount
Motor
Ultrasonic
Optical Formula | Elements
16 elements
18 elements
Optical Formula | Groups
11 groups
13 groups
Optical Formula | Special Glass
2 aspherical elements, 3 ED elements groups
Three ED and aspherical elements + HD and SP coatings groups
Dimensions
Filter Diameter
82 mm / 3.23 in
Size | Diameter
95 mm / 3.74 in
99 mm / 3.90 in
Size | Length
91 mm / 3.58 in
144 mm / 5.67 in
Weight
747 g / 26.40 oz
1040 g / 36.75 oz
Function
Angle Of View
107.8° Diagonal | 97.4° Horizontal | 74.4° Vertical
110.6° Diagonal | 100.4° Horizontal | 77.3° Vertical (wide) ~ 71.6° Diagonal | 61.9° Horizontal | 43.6° Vertical (tele)
Aperture
f/4 ~ f/22
f/2.8 ~ f/22
Autofocus
No
Yes
Crop Factor
0.8
Focal Length
20 mm
15 mm ~ 30 mm
Focal Length (35mm Equivalent)
15.8 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
Weather Resistance
Yes
Performance
Max Magnification
0.17x
0.2x
Min Focus Distance
250 mm / 9.84 in
280 mm / 11.02 in
Production
Accessory
Lens hood included
Lens hood included
Debut
2022-03-28
2016-02-17
Reviews
Neofiliac score
75%
31%
Pros
- Comes with physical aperture ring
- Shift functionality
- 14-bladed aperture
- Constant f/2.8 aperture
- Great optical performance
- Weather-sealed
- Beautifully constructed
Cons
- Large diameter
- Rather long
- On the heavy side
- Lacks front filter thread
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