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Compare Canon EF-S 10-18mm F4.5–5.6 vs Pentax-DA 645 28-45mm F4.5 vs Pentax-FA645 35mm F3.5

Construction

Aperture Blades
7 blades
9 blades, Rounded blades
9 blades, Rounded aperture
Colors
Black
Form Factor
Ultra Wide-Angle Zoom Lens
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
APS-C
Medium Format (645)
Medium Format (645)
Lens Barrel
Distance scale
Physical aperture ring, Distance scale
Lens Mount
Canon EF-mount
Pentax 645 KAF2 bayonet
Pentax 645 KAF2 bayonet
Material
Metal
Motor
Stepper motor
Optical Formula | Elements
14 elements
17 elements
10 elements
Optical Formula | Groups
11 groups
12 groups
7 groups
Optical Formula | Special Glass
UD lens element and enhanced lens coatings groups
HD and Aero Bright coatings groups
HRI and hybrid aspherical elements, HD and SP coatings groups

Dimensions

Filter Diameter
67 mm / 2.64 in
82 mm / 3.23 in
82 mm / 3.23 in
Size | Diameter
75 mm / 2.95 in
99 mm / 3.90 in
88 mm / 3.46 in
Size | Length
72 mm / 2.83 in
152 mm / 5.98 in
90 mm / 3.54 in
Weight
240 g / 8.48 oz
1470 g / 51.94 oz
570 g / 20.14 oz

Function

Angle Of View
107.1° Diagonal | 96.7° Horizontal | 73.7° Vertical (wide) ~ 73.9° Diagonal | 64.0° Horizontal | 45.2° Vertical (tele)
102.6° Diagonal | 92.1° Horizontal | 69.3° Vertical (wide) ~ 75.6° Diagonal | 65.7° Horizontal | 46.5° Vertical (tele)
89.9° Diagonal | 79.4° Horizontal | 57.9° Vertical
Aperture
f/4.5–5.6 ~ f/22–29
f/4.5 ~ f/32
f/3.5 ~ f/32
Autofocus
Yes
Yes
Yes
Crop Factor
1.6
0.6
0.6
Focal Length
10 mm ~ 18 mm
28 mm ~ 45 mm
35 mm
Focal Length (35mm Equivalent)
16.0 mm ~ 28.8 mm
17.4 mm ~ 27.9 mm
21.7 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
Yes
Yes
No
Weather Resistance
No
Yes
No
Zoom Type
Internal zoom
Internal zoom

Performance

Max Magnification
0.15x
0.21x
0.25x
Min Focus Distance
220 mm / 8.66 in
400 mm / 15.75 in
300 mm / 11.81 in

Production

Accessory
Lens Hood: EW-73 C (sold separately)
Lens Hood: 38709 (supplied)
Lens Hood: PH-RBE82 (supplied)
Debut
2014-05-13
2014-08-04
2015-11-11

Reviews

Neofiliac score
62%
68%
68%
Pros
  • Optically stabilized
  • Light in the hand
  • Internal zoom
  • Superb image quality
  • Optically stabilized
  • Internal zoom
  • Weather-sealed
  • Solidly built
  • 0.25x reproduction ratio
  • Rather compact for what it is
  • Comes with physical aperture ring
Cons
  • Dark maximum aperture
  • Lens hood not included
  • Lacks weather sealing
  • Not the best build quality
  • Not the sharpest
  • Dark maximum aperture
  • Large and heavy
  • Rather expensive
  • Lacks weather sealing

Price

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