Compare Sigma 50-100mm F1.8 DC HSM vs Sigma 18-35mm F1.8 DC HSM vs Pentax-D FA 70-210mm F4
Construction
Aperture Blades
9 blades, Rounded blades
9 blades, Rounded diaphragm
9 blades
Colors
Black
Black
Form Factor
Telephoto Zoom Lens
Zoom Lens
Super Telephoto Zoom Lens
Image Size
APS-C
APS-C
APS-C
Lens Barrel
Distance scale
Focus limiter, Distance scale
Lens Mount
Canon EF-mount, Nikon F-mount, Sigma SA-mount
Canon EF-mount, Nikon F-mount, Pentax K-mount, Sigma SA-mount, Sony A-mount
Pentax K-mount
Material
Magnesium alloy
Motor
Ring-type ultrasonic
Ring-type ultrasonic
Optical Formula | Elements
21 elements
17 elements
20 elements
Optical Formula | Groups
15 groups
12 groups
14 groups
Optical Formula | Special Glass
Three FLD, one SLD, one HRI elements groups
5 SLD glass elements, 4 glassmold aspherical elements groups
2 anomalous dispersion and 3 ED elements + HD coating groups
Dimensions
Filter Diameter
82 mm / 3.23 in
72 mm / 2.83 in
67 mm / 2.64 in
Size | Diameter
94 mm / 3.70 in
78 mm / 3.07 in
79 mm / 3.11 in
Size | Length
171 mm / 6.73 in
121 mm / 4.76 in
175 mm / 6.89 in
Weight
1490 g / 52.65 oz
810 g / 28.62 oz
819 g / 28.94 oz
Function
Angle Of View
32.2° Diagonal | 27.0° Horizontal | 18.2° Vertical (wide) ~ 16.4° Diagonal | 13.7° Horizontal | 9.1° Vertical (tele)
77.4° Diagonal | 67.4° Horizontal | 47.9° Vertical (wide) ~ 44.8° Diagonal | 37.8° Horizontal | 25.8° Vertical (tele)
23.3° Diagonal | 19.5° Horizontal | 13.0° Vertical (wide) ~ 7.9° Diagonal | 6.5° Horizontal | 4.4° Vertical (tele)
Aperture
f/1.8 ~ f/16
f/1.8 ~ f/16
f/4 ~ f/32
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
1.5
Focal Length
50 mm ~ 100 mm
18 mm ~ 35 mm
70 mm ~ 210 mm
Focal Length (35mm Equivalent)
75.0 mm ~ 150.0 mm
27.0 mm ~ 52.5 mm
105.0 mm ~ 315.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Yes
Zoom Type
Internal zoom
Internal zoom
Internal zoom
Performance
Max Magnification
0.15x
0.23x
0.32x
Min Focus Distance
950 mm / 37.40 in
280 mm / 11.02 in
950 mm / 37.40 in
Production
Accessory
Lens hood included
Lens Hood: LH780-03 (supplied)
Lens hood included
Debut
2016-02-23
2013-04-18
2020-01-22
Made In
Japan
Japan
Reviews
Neofiliac score
46%
65%
31%
Pros
- Superb image quality
- Internal zoom
- Internal zoom
- High levels of resolution
- Weather-sealed
- Beautifully built
- Very useful focal range
Cons
- Very large and heavy for an APS-C lens
- Lacks weather sealing
- Rather large and heavy for an APS-C lens
- Dark maximum aperture
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