Compare Olympus 300mm F4 IS Pro vs Panasonic DG 100-400mm F4.0-6.3 vs Panasonic DG 25-50mm F1.7
Construction
Aperture Blades
9 blades
9 blades, Circular blades
9 circular aperture diaphragms
Colors
Black
Black
Form Factor
Super Telephoto Prime Lens
Super Telephoto Zoom Lens
Image Size
MFT
MFT
Full-frame
Lens Barrel
Focus limiter, Tripod collar
Focus limiter, Tripod collar
Lens Mount
Micro Four Thirds-mount
Micro Four Thirds-mount
Micro Four Thirds mount
Motor
Micro-type ultrasonic
Micromotor
Optical Formula | Elements
17 elements
20 elements
16 elements
Optical Formula | Groups
10 groups
13 groups
11 groups
Optical Formula | Special Glass
Three super ED, one extra-high refractive, three high refractive elements + ZERO nano coating groups
1 aspherical ED, 1 UED, 2 ED elements groups
1 aspherical lens, 3 ED lenses, 1 UHR lens groups
Dimensions
Filter Diameter
77 mm / 3.03 in
72 mm / 2.83 in
77 mm
Size | Diameter
93 mm / 3.66 in
83 mm / 3.27 in
87.6 mm
Size | Length
227 mm / 8.94 in
172 mm / 6.77 in
127.6 mm
Weight
1270 g / 44.88 oz
985 g / 34.81 oz
654 g
Function
Angle Of View
4.1° Diagonal | 3.4° Horizontal | 2.3° Vertical
12.4° Diagonal | 10.3° Horizontal | 6.9° Vertical (wide) ~ 3.1° Diagonal | 2.6° Horizontal | 1.7° Vertical (tele)
47° ~ 24°
Aperture
f/4 ~ f/22
f/4–6.3 ~ f/22
F/1.7 ~ f/16
Autofocus
Yes
Yes
Crop Factor
2.0
2.0
Focal Length
300 mm
100 mm ~ 400 mm
0.28 m / 0.92 ft @ 25mm, 0.31 m / 1.02 ft @ 50mm
Focal Length (35mm Equivalent)
600.0 mm
200.0 mm ~ 800.0 mm
50-100 mm
Focus Type
Internal
Extending front
Image Stabilization
Yes
Yes
Operating Temperature
-10°C ~ 40°C
Weather Resistance
Yes
Yes
Dust, moisture
Zoom Type
External zoom (zoom lock available)
External zoom
Performance
Max Magnification
0.24x
0.25x
0.21x @ 50mm
Min Focus Distance
1400 mm / 55.12 in
1300 mm / 51.18 in
0.37 m
Production
Accessory
Lens hood included
Lens hood included
Debut
2016-01-06
2016-01-05
2021-07-08
Model Name
H-RS100400
H-X2550
Reviews
Neofiliac score
39%
50%
Pros
- 600mm equivalent reach
- Optically stabilized
- Weather-sealed
- Comes with a tripod collar
- Good autofocus
- Very sharp
- Amazing 800mm equivalent reach
- Optically stabilized
- Zoom lock prevents zoom creep
- Weather-sealed
- Comes with a tripod collar
- Superb sharpness
Cons
- Large and heavy
- Rather expensive
- Dark maximum aperture
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