Compare Pentax-D FA* 70-200mm F2.8 vs Pentax-DA 20-40mm F2.8-4 vs Pentax-DA* 16-50mm F2.8
Construction
Aperture Blades
9 blades, Rounded (f/2.8-5.6)
9 blades, Rounded aperture
9 blades
Colors
Black or Silver
Black, silver
Black
Form Factor
Telephoto Zoom Lens
Standard Zoom Lens
Standard Zoom Lens
Image Size
Full-Frame
APS-C
APS-C
Lens Barrel
Focus limiter, Tripod collar, Distance scale
Distance scale, DoF scale
Lens Mount
Pentax K-mount
Pentax K-mount
Pentax K-mount
Material
Aluminium barrel
Magnesium alloy
Motor
Micromotor
Stepper motor
Optical Formula | Elements
19 elements
9 elements
16 elements
Optical Formula | Groups
16 groups
8 groups
10 groups
Optical Formula | Special Glass
HD, AB, Super Protect coatings groups
1 ED glass element, 1 SLD glass element, HD coating groups
ED + anomalous glass + aspherical elements, HD coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
55 mm / 2.17 in
77 mm / 3.03 in
Size | Diameter
92 mm / 3.62 in
71 mm / 2.80 in
84 mm / 3.31 in
Size | Length
203 mm / 7.99 in
69 mm / 2.72 in
117 mm / 4.61 in
Weight
1755 g / 62.01 oz
283 g / 10.00 oz
712 g / 25.16 oz
Function
Angle Of View
34.4° Diagonal | 28.8° Horizontal | 19.5° Vertical (wide) ~ 12.4° Diagonal | 10.3° Horizontal | 6.9° Vertical (tele)
71.6° Diagonal | 61.9° Horizontal | 43.6° Vertical (wide) ~ 39.7° Diagonal | 33.4° Horizontal | 22.6° Vertical (tele)
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical (wide) ~ 32.2° Diagonal | 27.0° Horizontal | 18.2° Vertical (tele)
Aperture
f/2.8 ~ f/22
f/2.8–4 ~ f/22–32
f/2.8 ~ f/22
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
Focal Length
70 mm ~ 200 mm
20 mm ~ 40 mm
16 mm ~ 50 mm
Focal Length (35mm Equivalent)
30.0 mm ~ 60.0 mm
24.0 mm ~ 75.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
Yes
Yes
Yes
Zoom Type
External zoom (zoom lock available)
External zoom
External zoom
Performance
Max Magnification
0.13x
0.2x
0.24x
Min Focus Distance
1200 mm / 47.24 in
280 mm / 11.02 in
300 mm / 11.81 in
Production
Accessory
Lens Hood: PH-RBM77 (supplied)
Lens Hood: MH-RA55 (supplied)
Lens Hood: PH-RBN77 (sold separately)
Debut
2015-02-04
2013-11-06
2021-07-14
Reviews
Neofiliac score
40%
50%
40%
Pros
- Superb image quality
- Zoom lock prevents zoom creep
- Weather-sealed
- Comes with a tripod collar
- Very nice construction
- Well priced
- Weather-sealed
- Beautiful construction for manual focusing
- Weather-sealed
- Solid build quality
Cons
- Large and heavy
- External zoom without zoom lock
- Not the most interesting focal range
- Exterior designed like a 1990's lens
- External zoom without zoom lock
- Lens hood not included
- Expensive for APS-C
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