Compare Sigma 18-35mm F1.8 DC HSM vs Pentax-D FA 70-210mm F4 vs Pentax-DA* 16-50mm F2.8
Construction
Aperture Blades
9 blades, Rounded diaphragm
9 blades
9 blades
Colors
Black
Black
Form Factor
Zoom Lens
Super Telephoto Zoom Lens
Standard 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, Pentax K-mount, Sigma SA-mount, Sony A-mount
Pentax K-mount
Pentax K-mount
Material
Magnesium alloy
Magnesium alloy
Motor
Ring-type ultrasonic
Ring-type ultrasonic
Stepper motor
Optical Formula | Elements
17 elements
20 elements
16 elements
Optical Formula | Groups
12 groups
14 groups
10 groups
Optical Formula | Special Glass
5 SLD glass elements, 4 glassmold aspherical elements groups
2 anomalous dispersion and 3 ED elements + HD coating groups
ED + anomalous glass + aspherical elements, HD coating groups
Dimensions
Filter Diameter
72 mm / 2.83 in
67 mm / 2.64 in
77 mm / 3.03 in
Size | Diameter
78 mm / 3.07 in
79 mm / 3.11 in
84 mm / 3.31 in
Size | Length
121 mm / 4.76 in
175 mm / 6.89 in
117 mm / 4.61 in
Weight
810 g / 28.62 oz
819 g / 28.94 oz
712 g / 25.16 oz
Function
Angle Of View
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)
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical (wide) ~ 32.2° Diagonal | 27.0° Horizontal | 18.2° Vertical (tele)
Aperture
f/1.8 ~ f/16
f/4 ~ f/32
f/2.8 ~ f/22
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
1.5
Focal Length
18 mm ~ 35 mm
70 mm ~ 210 mm
16 mm ~ 50 mm
Focal Length (35mm Equivalent)
27.0 mm ~ 52.5 mm
105.0 mm ~ 315.0 mm
24.0 mm ~ 75.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
Yes
Yes
Zoom Type
Internal zoom
Internal zoom
External zoom
Performance
Max Magnification
0.23x
0.32x
0.24x
Min Focus Distance
280 mm / 11.02 in
950 mm / 37.40 in
300 mm / 11.81 in
Production
Accessory
Lens Hood: LH780-03 (supplied)
Lens hood included
Lens Hood: PH-RBN77 (sold separately)
Debut
2013-04-18
2020-01-22
2021-07-14
Made In
Japan
Reviews
Neofiliac score
65%
31%
40%
Pros
- Internal zoom
- High levels of resolution
- Weather-sealed
- Beautifully built
- Very useful focal range
- Weather-sealed
- Solid build quality
Cons
- Rather large and heavy for an APS-C lens
- Dark maximum aperture
- Exterior designed like a 1990's lens
- External zoom without zoom lock
- Lens hood not included
- Expensive for APS-C
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