Compare Pentax-DA 645 28-45mm F4.5 vs Canon RF 15-30mm F4.5-6.3 vs Canon RF 14-35mm F4
Construction
Aperture Blades
9 blades, Rounded blades
7 blades
9 blades
Colors
Black
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Zoom Lens
Wide-Angle Zoom Lens
Image Size
Medium Format (645)
Full-Frame
Full-Frame
Lens Barrel
Distance scale
Distance scale
Lens Mount
Pentax 645 KAF2 bayonet
Canon RF-mount
Canon RF-mount
Material
Metal
Magnesium alloy
Motor
Stepper motor
Nano ultrasonic
Optical Formula | Elements
17 elements
13 elements
16 elements
Optical Formula | Groups
12 groups
11 groups
12 groups
Optical Formula | Special Glass
HD and Aero Bright coatings groups
Two ultra-low dispersion elements and one aspherical element. Uses Canon’s Super Spectra Coating (SSC). groups
3 UD + 3 aspherical elements, Super Spectra + Sub-wavelength Structure + Air Sphere coatings groups
Dimensions
Filter Diameter
82 mm / 3.23 in
67 mm / 2.64 in
77 mm / 3.03 in
Size | Diameter
99 mm / 3.90 in
77 mm / 3.03 in
84 mm / 3.31 in
Size | Length
152 mm / 5.98 in
88 mm / 3.46 in
100 mm / 3.94 in
Weight
1470 g / 51.94 oz
390 g / 13.78 oz
540 g / 19.08 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)
110.6° Diagonal | 100.4° Horizontal | 77.3° Vertical (wide) ~ 71.6° Diagonal | 61.9° Horizontal | 43.6° Vertical (tele)
114.2° Diagonal | 104.3° Horizontal | 81.2° Vertical (wide) ~ 63.5° Diagonal | 54.4° Horizontal | 37.8° Vertical (tele)
Aperture
f/4.5 ~ f/32
f/4.5–6.3 ~ f/22–32
f/4 ~ f/22
Autofocus
Yes
Yes
Yes
Crop Factor
0.6
Focal Length
28 mm ~ 45 mm
15 mm ~ 30 mm
14 mm ~ 35 mm
Focal Length (35mm Equivalent)
17.4 mm ~ 27.9 mm
Focus Type
Internal
Internal
Image Stabilization
Yes
Yes
Yes (5.5 stops)
Weather Resistance
Yes
No
Yes
Zoom Type
Internal zoom
External zoom
Performance
Max Magnification
0.21x
0.38x
Min Focus Distance
400 mm / 15.75 in
130 mm / 5.12 in
200 mm / 7.87 in
Production
Accessory
Lens Hood: 38709 (supplied)
Lens hood included
Lens hood included
Debut
2014-08-04
2022-07-12
2021-06-29
Reviews
Neofiliac score
68%
37%
71%
Pros
- Superb image quality
- Optically stabilized
- Internal zoom
- Weather-sealed
- Solidly built
- Affordable
- Interesting zoom range
- Stabilized
- Superb image quality
- Low distortion
- Optically stabilized
- Weather-sealed
- Accepts front filters
- Wider focal range than the competition / DSLRs
Cons
- Dark maximum aperture
- Large and heavy
- Rather expensive
- Dark maximum aperture
- External zoom without zoom lock
- Lacks weather sealing
- Low build quality
- Dark maximum aperture
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