Compare Pentax-FA 43mm F1.9 vs Pentax-D FA* 50mm F1.4
Construction
Aperture Blades
8 blades
9 blades
Colors
Black, silver
Black
Form Factor
Normal Prime Lens
Normal Prime Lens
Image Size
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Distance scale
Lens Mount
Pentax K-mount
Pentax K-mount
Material
Aluminum
Motor
Screw drive from camera
Ring-type ultrasonic
Optical Formula | Elements
7 elements
15 elements
Optical Formula | Groups
6 groups
9 groups
Optical Formula | Special Glass
HD + Super Protect coatings groups
1 aspherical + 3 anamalous dispersion elements, Aero Bright II + HD + Super Protect coatings groups
Dimensions
Filter Diameter
49 mm / 1.93 in
72 mm / 2.83 in
Size | Diameter
64 mm / 2.52 in
80 mm / 3.15 in
Size | Length
27 mm / 1.06 in
106 mm / 4.17 in
Weight
155 g / 5.48 oz
910 g / 32.16 oz
Function
Angle Of View
53.4° Diagonal | 45.4° Horizontal | 31.2° Vertical
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
Aperture
f/1.9 ~ f/22
f/1.4 ~ f/16
Autofocus
Yes
Yes
Focal Length
43 mm
50 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
Weather Resistance
No
Yes
Performance
Max Magnification
0.12x
0.18x
Min Focus Distance
450 mm / 17.72 in
400 mm / 15.75 in
Production
Accessory
Lens hood included
Lens hood included
Debut
2021-02-24
2017-10-26
Reviews
Neofiliac score
68%
68%
Pros
- Compact and lightweight
- Comes with physical aperture ring
- Bright maximum aperture
- Weather-sealed
- Very sharp
Cons
- Lacks weather sealing
- Expensive for a pancake lens
- On the heavy side
- Slow autofocus
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