Compare PENTAX-D FA 28-105mm F3.5-5.6 vs Pentax DA 50mm F1.8 vs Pentax-FA 43mm F1.9
Construction
Aperture Blades
9 blades
8 blades
8 blades
Colors
Black
Black
Black, silver
Form Factor
Standard Zoom Lens
Normal Prime Lens
Normal Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Pentax K-mount
Pentax K-mount
Pentax K-mount
Material
Aluminum
Motor
Micromotor
Ultrasonic
Screw drive from camera
Optical Formula | Elements
15 elements
6 elements
7 elements
Optical Formula | Groups
11 groups
5 groups
6 groups
Optical Formula | Special Glass
One ED and two aspherical elements + HD and SP coatings groups
HD + Super Protect coatings groups
Dimensions
Filter Diameter
62 mm / 2.44 in
52 mm / 2.05 in
49 mm / 1.93 in
Size | Diameter
73 mm / 2.87 in
63 mm / 2.48 in
64 mm / 2.52 in
Size | Length
87 mm / 3.43 in
39 mm / 1.54 in
27 mm / 1.06 in
Weight
440 g / 15.55 oz
122 g / 4.31 oz
155 g / 5.48 oz
Function
Angle Of View
75.4° Diagonal | 65.5° Horizontal | 46.4° Vertical (wide) ~ 23.3° Diagonal | 19.5° Horizontal | 13.0° Vertical (tele)
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
53.4° Diagonal | 45.4° Horizontal | 31.2° Vertical
Aperture
f/3.5–5.6 ~ f/22–38
f/1.8 ~ f/22
f/1.9 ~ f/22
Autofocus
Yes
Yes
Yes
Focal Length
28 mm ~ 105 mm
50 mm
43 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
Yes
No
No
Performance
Max Magnification
0.22x
0.12x
Min Focus Distance
500 mm / 19.69 in
450 mm / 17.72 in
Production
Accessory
Lens Hood: PH-RBC62 (supplied)
Lens Hood: RH-RA (sold separately)
Lens hood included
Debut
2016-02-17
2012-05-21
2021-02-24
Reviews
Neofiliac score
59%
59%
68%
Pros
- Weather-sealed
- Very compact and lightweight
- Comes with physical aperture ring
- Compact and lightweight
- Comes with physical aperture ring
Cons
- Not Pentax's best build quality
- Not the best optical performance
- Lens hood not included
- Lacks weather sealing
- Basic construction
- Not the strongest in IQ
- Lacks weather sealing
- Expensive for a pancake lens
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