Compare Samyang 20mm F1.8 ED AS UMC vs Samyang 7.5mm F3.5 UMC Fisheye vs Panasonic G 12.5mm F12
Construction
Aperture Blades
7 blades
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Wide-Angle Prime Lens
Image Size
Full-Frame
MFT
MFT
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
Micro Four Thirds-mount
Micro Four Thirds-mount
Motor
Micromotor
Optical Formula | Elements
13 elements
9 elements
4 elements
Optical Formula | Groups
12 groups
7 groups
3 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
Size | Diameter
83 mm / 3.27 in
60 mm / 2.36 in
75 mm / 2.95 in
Size | Length
88 mm / 3.46 in
48 mm / 1.89 in
21 mm / 0.83 in
Weight
497 g / 17.56 oz
197 g / 6.96 oz
45 g / 1.59 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
180° Diagonal (fisheye)
81.8° Diagonal | 71.5° Horizontal | 51.3° Vertical
Aperture
f/1.8 ~ f/22
f/3.5 ~ f/22
f/12 fixed
Autofocus
No
No
Yes
Crop Factor
2.0
2.0
Focal Length
20 mm
7.5 mm
12.5 mm
Focal Length (35mm Equivalent)
15.0 mm
25.0 mm
Focus Type
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
Performance
Max Magnification
0.02x
Min Focus Distance
200 mm / 7.87 in
90 mm / 3.54 in
600 mm / 23.62 in
Production
Accessory
Lens hood included
Lens Hood: Built-in petal-type hood (supplied)
Lens hood sold separately
Debut
2016-08-08
2011-09-05
2010-09-21
Model Name
H-FT012
Reviews
Neofiliac score
59%
50%
41%
Pros
- Rather affordable
- Very light and compact
- 180° FOV
- Enables 3D shooting
- Compact and lightweight
Cons
- Lacks weather sealing
- Not the highest grade of build
- Lacks front filter thread
- Lacks weather sealing
- Very dark fixed aperture
- Lacks front filter thread
- No lens hood available
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