Compare Pentax-D FA* 50mm F1.4 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
Normal Prime Lens
Normal Prime Lens
Normal Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Distance scale
Physical aperture ring
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Pentax K-mount
Pentax K-mount
Pentax K-mount
Material
Aluminum
Motor
Ring-type ultrasonic
Ultrasonic
Screw drive from camera
Optical Formula | Elements
15 elements
6 elements
7 elements
Optical Formula | Groups
9 groups
5 groups
6 groups
Optical Formula | Special Glass
1 aspherical + 3 anamalous dispersion elements, Aero Bright II + HD + Super Protect coatings groups
HD + Super Protect coatings groups
Dimensions
Filter Diameter
72 mm / 2.83 in
52 mm / 2.05 in
49 mm / 1.93 in
Size | Diameter
80 mm / 3.15 in
63 mm / 2.48 in
64 mm / 2.52 in
Size | Length
106 mm / 4.17 in
39 mm / 1.54 in
27 mm / 1.06 in
Weight
910 g / 32.16 oz
122 g / 4.31 oz
155 g / 5.48 oz
Function
Angle Of View
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
53.4° Diagonal | 45.4° Horizontal | 31.2° Vertical
Aperture
f/1.4 ~ f/16
f/1.8 ~ f/22
f/1.9 ~ f/22
Autofocus
Yes
Yes
Yes
Focal Length
50 mm
50 mm
43 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
Yes
No
No
Performance
Max Magnification
0.18x
0.12x
Min Focus Distance
400 mm / 15.75 in
450 mm / 17.72 in
Production
Accessory
Lens hood included
Lens Hood: RH-RA (sold separately)
Lens hood included
Debut
2017-10-26
2012-05-21
2021-02-24
Reviews
Neofiliac score
68%
59%
68%
Pros
- Bright maximum aperture
- Weather-sealed
- Very sharp
- Very compact and lightweight
- Comes with physical aperture ring
- Compact and lightweight
- Comes with physical aperture ring
Cons
- On the heavy side
- Slow autofocus
- 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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