Compare Sigma 18-35mm F1.8 DC HSM vs Pentax DA 55-300mm F4.0-5.8 vs Pentax-D FA 70-210mm F4
Construction
Aperture Blades
9 blades, Rounded diaphragm
6 blades
9 blades
Colors
Black
Black
Form Factor
Zoom Lens
Super Telephoto Zoom Lens
Super Telephoto Zoom Lens
Image Size
APS-C
APS-C
APS-C
Lens Barrel
Distance scale
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
Motor
Ring-type ultrasonic
Screw drive from camera
Ring-type ultrasonic
Optical Formula | Elements
17 elements
12 elements
20 elements
Optical Formula | Groups
12 groups
8 groups
14 groups
Optical Formula | Special Glass
5 SLD glass elements, 4 glassmold aspherical elements groups
ED glass elements groups
2 anomalous dispersion and 3 ED elements + HD coating groups
Dimensions
Filter Diameter
72 mm / 2.83 in
58 mm / 2.28 in
67 mm / 2.64 in
Size | Diameter
78 mm / 3.07 in
71 mm / 2.80 in
79 mm / 3.11 in
Size | Length
121 mm / 4.76 in
112 mm / 4.41 in
175 mm / 6.89 in
Weight
810 g / 28.62 oz
466 g / 16.47 oz
819 g / 28.94 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)
29.4° Diagonal | 24.6° Horizontal | 16.6° Vertical (wide) ~ 5.5° Diagonal | 4.6° Horizontal | 3.1° 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/4–5.8 ~ f/22–32
f/4 ~ f/32
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
1.5
Focal Length
18 mm ~ 35 mm
55 mm ~ 300 mm
70 mm ~ 210 mm
Focal Length (35mm Equivalent)
27.0 mm ~ 52.5 mm
82.5 mm ~ 450.0 mm
105.0 mm ~ 315.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
Yes
Yes
Zoom Type
Internal zoom
External zoom
Internal zoom
Performance
Max Magnification
0.23x
0.28x
0.32x
Min Focus Distance
280 mm / 11.02 in
1400 mm / 55.12 in
950 mm / 37.40 in
Production
Accessory
Lens Hood: LH780-03 (supplied)
Lens Hood: PH-RBI 58mm (supplied)
Lens hood included
Debut
2013-04-18
2013-10-07
2020-01-22
Made In
Japan
Reviews
Neofiliac score
65%
50%
31%
Pros
- Internal zoom
- High levels of resolution
- Weather-sealed
- Great price for the price
- Weather-sealed
- Beautifully built
- Very useful focal range
Cons
- Rather large and heavy for an APS-C lens
- Dark and variable maximum aperture
- External zoom without zoom lock
- Not the best from Pentax
- Dark maximum aperture
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