Compare Sigma 18-200mm F3.5-6.3 DC Macro OS HSM vs Pentax-DA* 16-50mm F2.8 vs Pentax-D FA 24-70mm F2.8
Construction
Aperture Blades
7 blades, Rounded diaphragm
9 blades
9 blades
Colors
Black
Black
Form Factor
All-in-One Zoom Lens
Standard Zoom Lens
Standard Zoom Lens
Image Size
APS-C
APS-C
Full-Frame
Lens Barrel
Distance scale
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
Ultrasonic
Stepper motor
Ultrasonic
Optical Formula | Elements
16 elements
16 elements
17 elements
Optical Formula | Groups
13 groups
10 groups
12 groups
Optical Formula | Special Glass
SLD glass elements, Double-sided aspheric lenses groups
ED + anomalous glass + aspherical elements, HD coating groups
Three ED + four aspherical elements + HD Coating groups
Dimensions
Filter Diameter
62 mm / 2.44 in
77 mm / 3.03 in
82 mm / 3.23 in
Size | Diameter
71 mm / 2.80 in
84 mm / 3.31 in
89 mm / 3.50 in
Size | Length
86 mm / 3.39 in
117 mm / 4.61 in
110 mm / 4.33 in
Weight
430 g / 15.19 oz
712 g / 25.16 oz
787 g / 27.81 oz
Function
Angle Of View
77.4° Diagonal | 67.4° Horizontal | 47.9° Vertical (wide) ~ 8.3° Diagonal | 6.9° Horizontal | 4.6° Vertical (tele)
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical (wide) ~ 32.2° Diagonal | 27.0° Horizontal | 18.2° Vertical (tele)
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical (wide) ~ 34.4° Diagonal | 28.8° Horizontal | 19.5° Vertical (tele)
Aperture
f/3.5–6.3 ~ f/22
f/2.8 ~ f/22
f/2.8 ~ f/22
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
Focal Length
18 mm ~ 200 mm
16 mm ~ 50 mm
24 mm ~ 70 mm
Focal Length (35mm Equivalent)
27.0 mm ~ 300.0 mm
24.0 mm ~ 75.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
Yes
No
No
Weather Resistance
Yes
Yes
Zoom Type
External zoom (zoom lock available)
External zoom
Performance
Max Magnification
0.33x
0.24x
0.2x
Min Focus Distance
390 mm / 15.35 in
300 mm / 11.81 in
380 mm / 14.96 in
Production
Accessory
Lens Hood: PH-RBN77 (sold separately)
Lens Hood: PH-RBD82 (supplied)
Debut
2014-01-06
2021-07-14
2015-09-24
Made In
Japan
Reviews
Neofiliac score
55%
40%
59%
Pros
- Optically stabilized
- Zoom lock prevents zoom creep
- Superb build quality
- Very useful focal range
- Weather-sealed
- Solid build quality
- Weather-sealed
- Good autofocus performance
- Well priced for f/2.8 standard zoom
Cons
- All-in-one lenses tend to offer lower IQ
- Exterior designed like a 1990's lens
- External zoom without zoom lock
- Lens hood not included
- Expensive for APS-C
- Not as well built as newer Pentax lenses
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