Compare Pentax-DA 55-300mm F4.5-6.3 vs Pentax-DA 20-40mm F2.8-4 vs Pentax-DA 55-300mm F4.5-6.3
Construction
Aperture Blades
9 blades, Rounded blades
9 blades, Rounded aperture
9 blades, Rounded 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
Lens Mount
Pentax K-mount
Pentax K-mount
Pentax K-mount
Material
Aluminium barrel
Motor
Stepper motor
Micromotor
Stepper motor
Optical Formula | Elements
14 elements
9 elements
14 elements
Optical Formula | Groups
11 groups
8 groups
11 groups
Optical Formula | Special Glass
ED elements + HD and SP coatings groups
1 ED glass element, 1 SLD glass element, HD coating groups
ED elements + HD and SP coatings groups
Dimensions
Filter Diameter
58 mm / 2.28 in
55 mm / 2.17 in
58 mm / 2.28 in
Size | Diameter
77 mm / 3.03 in
71 mm / 2.80 in
77 mm / 3.03 in
Size | Length
89 mm / 3.50 in
69 mm / 2.72 in
89 mm / 3.50 in
Weight
471 g / 16.64 oz
283 g / 10.00 oz
471 g / 16.64 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)
29.4° Diagonal | 24.6° Horizontal | 16.6° Vertical (wide) ~ 5.5° Diagonal | 4.6° Horizontal | 3.1° Vertical (tele)
Aperture
f/4.5–6.3 ~ f/22–32
f/2.8–4 ~ f/22–32
f/4.5–6.3 ~ f/22–32
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
1.5
Focal Length
55 mm ~ 300 mm
20 mm ~ 40 mm
55 mm ~ 300 mm
Focal Length (35mm Equivalent)
82.5 mm ~ 450.0 mm
30.0 mm ~ 60.0 mm
82.5 mm ~ 450.0 mm
Focus Type
Extending front
Extending front
Image Stabilization
No
No
No
Weather Resistance
Yes
Yes
Yes
Zoom Type
External zoom
External zoom
External zoom
Performance
Max Magnification
0.3x
0.2x
0.3x
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: PH-RBK58 (supplied)
Debut
2016-06-08
2013-11-06
2016-06-08
Reviews
Neofiliac score
50%
50%
50%
Pros
- Weather-sealed
- Very affordable for the reach it provides
- Weather-sealed
- Beautiful construction for manual focusing
- Weather-sealed
- Very affordable for the reach it provides
Cons
- Dark maximum aperture
- External zoom without zoom lock
- External zoom without zoom lock
- Not the most interesting focal range
- Dark maximum aperture
- External zoom without zoom lock
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