Compare 7Artisans 25mm F1.8 vs SIGMA 18-50mm F2.8 DC DN vs SIGMA 30mm F1.4 DC DN
Variants
E-mount
EF-M
L-mount
MFT
Construction
Aperture Blades
7 blades
7 blades, Rounded blades
9 blades, Rounded blades
Colors
Black
Black
Black
Form Factor
Normal Prime Lens
Standard Zoom Lens
Normal Prime Lens
Image Size
APS-C
APS-C
APS-C
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Canon EF-M-mount, Fujifilm X-mount, Micro Four Thirds-mount, Sony E-mount
Leica L-mount, Sony E-mount
Material
Aluminum
Motor
Stepper motor
Stepper motor
Optical Formula | Elements
7 elements
13 elements
9 elements
Optical Formula | Groups
5 groups
10 groups
7 groups
Optical Formula | Special Glass
1 Super Low Dispersion and 3 aspherical elements groups
1 aspherical and 1 double-sided aspherical groups
Dimensions
Filter Diameter
46 mm / 1.81 in
55 mm / 2.17 in
52 mm / 2.05 in
Size | Diameter
51 mm / 2.01 in
65 mm / 2.56 in
65 mm / 2.56 in
Size | Length
32 mm / 1.26 in
75 mm / 2.95 in
Weight
143 g / 5.05 oz
290 g / 10.25 oz
Function
Angle Of View
60.0° Diagonal | 51.3° Horizontal | 35.5° Vertical
77.4° Diagonal | 67.4° Horizontal | 47.9° Vertical (wide) ~ 32.2° Diagonal | 27.0° Horizontal | 18.2° Vertical (tele)
Aperture
f/1.8 ~ f/22
f/2.8 ~ f/22
f/1.4 ~ f/16
Autofocus
No
Yes
Crop Factor
1.5
1.5
Focal Length
25 mm
18 mm ~ 50 mm
30 mm
Focal Length (35mm Equivalent)
37.5 mm
27.0 mm ~ 75.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Yes
Yes
Zoom Type
External zoom
Performance
Max Magnification
0.14x
Min Focus Distance
180 mm / 7.09 in
120 mm / 4.72 in
300 mm / 11.81 in
Production
Accessory
Lens Hood: LH582-02 (supplied)
Lens Hood: LH586-01, supplied
Debut
2017-06-28
2021-10-19
Made In
Japan
Japan
Reviews
Neofiliac score
59%
55%
Pros
- Short barrel
- Light in the hand
- Appears well-built
- Constant f/2.8 aperture
- Very sharp wide open
- Dust and splash protection
- Compact and light
- Fast autofocus
- Wide angle of view
- Fast and silent
Cons
- Lacks weather sealing
- Not the strongest in optical performance
- External zoom without zoom lock
- Not stabilized
- Difficult to upgrade firmware to V3
- Distorsion is visible in video
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