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Compare Pentax-DA 645 28-45mm F4.5 vs Fujifilm GF 250mm F4 vs Fujifilm GF 45-100mm F4

Construction

Aperture Blades
9 blades, Rounded blades
9 blades
9 blades
Colors
Black
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Medium Telephoto Prime Lens
Zoom Lens
Image Size
Medium Format (645)
Medium Format (44x33)
Medium Format (44x33)
Lens Barrel
Distance scale
Physical aperture ring, Tripod collar
Physical aperture ring
Lens Mount
Pentax 645 KAF2 bayonet
Fujifilm G-mount
Fujifilm G-mount
Material
Metal
Magnesium alloy
Magnesium alloy
Motor
Linear Motor
Linear Motor
Optical Formula | Elements
17 elements
16 elements
16 elements
Optical Formula | Groups
12 groups
10 groups
2 groups
Optical Formula | Special Glass
HD and Aero Bright coatings groups
1 Super ED + 2 ED elements groups
1 ED, 1 super ED, 3 aspherical elements groups

Dimensions

Filter Diameter
82 mm / 3.23 in
82 mm / 3.23 in
82 mm / 3.23 in
Size | Diameter
99 mm / 3.90 in
108 mm / 4.25 in
93 mm / 3.66 in
Size | Length
152 mm / 5.98 in
204 mm / 8.03 in
145 mm / 5.71 in
Weight
1470 g / 51.94 oz
1425 g / 50.35 oz
1005 g / 35.51 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)
12.5° Diagonal | 10.4° Horizontal | 7.0° Vertical
62.7° Diagonal | 53.7° Horizontal | 37.3° Vertical (wide) ~ 30.7° Diagonal | 25.7° Horizontal | 17.3° Vertical (tele)
Aperture
f/4.5 ~ f/32
f/4 ~ f/32
f/4 ~ f/32
Autofocus
Yes
Yes
Yes
Crop Factor
0.6
0.8
0.8
Focal Length
28 mm ~ 45 mm
250 mm
45 mm ~ 100 mm
Focal Length (35mm Equivalent)
17.4 mm ~ 27.9 mm
197.5 mm
35.6 mm ~ 79.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
Yes
Yes (5 stops)
Yes (5 stops)
Weather Resistance
Yes
Yes
Yes
Zoom Type
Internal zoom
External zoom

Performance

Max Magnification
0.21x
0.22x
0.13x
Min Focus Distance
400 mm / 15.75 in
1400 mm / 55.12 in
650 mm / 25.59 in

Production

Accessory
Lens Hood: 38709 (supplied)
Lens hood included
Lens hood included
Debut
2014-08-04
2018-04-12
2020-01-23

Reviews

Neofiliac score
68%
62%
52%
Pros
  • Superb image quality
  • Optically stabilized
  • Internal zoom
  • Weather-sealed
  • Solidly built
  • Superb image quality
  • Optically stabilized
  • Weather-sealed
  • Comes with physical aperture ring
  • Comes with a tripod collar
  • The longest lens on G-mount
  • Superb image quality
  • Optically stabilized
  • Weather-sealed
  • Comes with physical aperture ring
Cons
  • Dark maximum aperture
  • Large and heavy
  • Rather expensive
  • Large and heavy
  • Dark and variable maximum aperture
  • Very large and heavy
  • External zoom without zoom lock

Price

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