Compare Pentax-DA 645 28-45mm F4.5 vs Fujifilm GF 23mm F4 vs Fujifilm GF 63mm F2.8
Construction
Aperture Blades
9 blades, Rounded blades
9 blades, Rounded blades
9 blades, Rounded blades
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Normal Prime Lens
Image Size
Medium Format (645)
Medium Format (44x33)
Medium Format (44x33)
Lens Barrel
Distance scale
Physical aperture ring
Physical aperture ring
Lens Mount
Pentax 645 KAF2 bayonet
Fujifilm G-mount
Fujifilm G-mount
Material
Metal
Motor
Linear Motor
Optical Formula | Elements
17 elements
15 elements
10 elements
Optical Formula | Groups
12 groups
12 groups
8 groups
Optical Formula | Special Glass
HD and Aero Bright coatings groups
2 aspherical, 3 extra-low dispersion, 1 super ED groups
1 ED element groups
Dimensions
Filter Diameter
82 mm / 3.23 in
82 mm / 3.23 in
62 mm / 2.44 in
Size | Diameter
99 mm / 3.90 in
90 mm / 3.54 in
84 mm / 3.31 in
Size | Length
152 mm / 5.98 in
103 mm / 4.06 in
71 mm / 2.80 in
Weight
1470 g / 51.94 oz
845 g / 29.86 oz
405 g / 14.31 oz
Function
Angle Of View
102.6° Diagonal | 92.1° Horizontal | 69.3° Vertical (wide) ~ 75.6° Diagonal | 65.7° Horizontal | 46.5° Vertical (tele)
99.9° Diagonal
46.9° Diagonal
Aperture
f/4.5 ~ f/32
f/4 ~ f/32
f/2.8 ~ f/32
Autofocus
Yes
Yes
Yes
Crop Factor
0.6
0.8
0.8
Focal Length
28 mm ~ 45 mm
23 mm
63 mm
Focal Length (35mm Equivalent)
17.4 mm ~ 27.9 mm
18 mm
50 mm
Focus Type
Internal
Internal
Extending front
Image Stabilization
Yes
No
No
Weather Resistance
Yes
Yes
Yes
Zoom Type
Internal zoom
Performance
Max Magnification
0.21x
0.09x
0.17x
Min Focus Distance
400 mm / 15.75 in
380 mm / 14.96 in
500 mm / 19.69 in
Production
Accessory
Lens Hood: 38709 (supplied)
Lens hood included
Lens hood included
Debut
2014-08-04
2017-04-19
2017-01-19
Reviews
Neofiliac score
68%
80%
88%
Pros
- Superb image quality
- Optically stabilized
- Internal zoom
- Weather-sealed
- Solidly built
- Weather-sealed
- Comes with physical aperture ring
- Very sharp
- Lightweight and compact
- Weather-sealed
- Comes with physical aperture ring
- Beautifully built
- Very sharp
Cons
- Dark maximum aperture
- Large and heavy
- Rather expensive
- Quite heavy
- Dark maximum aperture
- Slow AF
- Corner weakeness
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