Compare Pentax-DA 55-300mm F4.5-6.3 vs Pentax-DA 20-40mm F2.8-4 vs Pentax-D FA 70-210mm F4
Construction
Aperture Blades
9 blades, Rounded blades
9 blades, Rounded aperture
9 blades
Colors
Black
Black, silver
Black
Form Factor
Super Telephoto Zoom Lens
Standard Zoom Lens
Super Telephoto Zoom Lens
Image Size
APS-C
APS-C
APS-C
Lens Barrel
Distance scale, DoF scale
Focus limiter, Distance scale
Lens Mount
Pentax K-mount
Pentax K-mount
Pentax K-mount
Material
Aluminium barrel
Magnesium alloy
Motor
Stepper motor
Micromotor
Ring-type ultrasonic
Optical Formula | Elements
14 elements
9 elements
20 elements
Optical Formula | Groups
11 groups
8 groups
14 groups
Optical Formula | Special Glass
ED elements + HD and SP coatings groups
1 ED glass element, 1 SLD glass element, HD coating groups
2 anomalous dispersion and 3 ED elements + HD coating groups
Dimensions
Filter Diameter
58 mm / 2.28 in
55 mm / 2.17 in
67 mm / 2.64 in
Size | Diameter
77 mm / 3.03 in
71 mm / 2.80 in
79 mm / 3.11 in
Size | Length
89 mm / 3.50 in
69 mm / 2.72 in
175 mm / 6.89 in
Weight
471 g / 16.64 oz
283 g / 10.00 oz
819 g / 28.94 oz
Function
Angle Of View
29.4° Diagonal | 24.6° Horizontal | 16.6° Vertical (wide) ~ 5.5° Diagonal | 4.6° Horizontal | 3.1° Vertical (tele)
71.6° Diagonal | 61.9° Horizontal | 43.6° Vertical (wide) ~ 39.7° Diagonal | 33.4° Horizontal | 22.6° Vertical (tele)
23.3° Diagonal | 19.5° Horizontal | 13.0° Vertical (wide) ~ 7.9° Diagonal | 6.5° Horizontal | 4.4° Vertical (tele)
Aperture
f/4.5–6.3 ~ f/22–32
f/2.8–4 ~ f/22–32
f/4 ~ f/32
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
1.5
Focal Length
55 mm ~ 300 mm
20 mm ~ 40 mm
70 mm ~ 210 mm
Focal Length (35mm Equivalent)
82.5 mm ~ 450.0 mm
30.0 mm ~ 60.0 mm
105.0 mm ~ 315.0 mm
Focus Type
Extending front
Internal
Image Stabilization
No
No
No
Weather Resistance
Yes
Yes
Yes
Zoom Type
External zoom
External zoom
Internal zoom
Performance
Max Magnification
0.3x
0.2x
0.32x
Min Focus Distance
950 mm / 37.40 in
280 mm / 11.02 in
950 mm / 37.40 in
Production
Accessory
Lens Hood: PH-RBK58 (supplied)
Lens Hood: MH-RA55 (supplied)
Lens hood included
Debut
2016-06-08
2013-11-06
2020-01-22
Reviews
Neofiliac score
50%
50%
31%
Pros
- Weather-sealed
- Very affordable for the reach it provides
- Weather-sealed
- Beautiful construction for manual focusing
- Weather-sealed
- Beautifully built
- Very useful focal range
Cons
- Dark maximum aperture
- External zoom without zoom lock
- External zoom without zoom lock
- Not the most interesting focal range
- Dark maximum aperture
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