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Compare Pentax-D FA 21mm F2.4ED vs Pentax-D FA* 50mm F1.4

Construction

Aperture Blades
8 blades, Rounded diaphragm
9 blades
Colors
Black, Silver
Black
Form Factor
Ultra Wide-Angle Prime Lens
Normal Prime Lens
Image Size
Full-Frame
Full-Frame
Lens Barrel
Distance scale, DoF scale
Distance scale
Lens Mount
Pentax K-mount
Pentax K-mount
Material
Aluminum
Motor
Ring-type ultrasonic
Optical Formula | Elements
11 elements
15 elements
Optical Formula | Groups
8 groups
9 groups
Optical Formula | Special Glass
4 ED elements, 1 Super ED element groups
1 aspherical + 3 anamalous dispersion elements, Aero Bright II + HD + Super Protect coatings groups

Dimensions

Filter Diameter
67 mm / 2.64 in
72 mm / 2.83 in
Size | Diameter
74 mm / 2.91 in
80 mm / 3.15 in
Size | Length
89 mm / 3.50 in
106 mm / 4.17 in
Weight
416 g / 14.70 oz
910 g / 32.16 oz

Function

Angle Of View
91.7° Diagonal | 81.2° Horizontal | 59.5° Vertical
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
Aperture
f/2.4–22 ~ f/2.4–22
f/1.4 ~ f/16
Autofocus
Yes
Yes
Focal Length
21 mm
50 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
Weather Resistance
Yes
Yes

Performance

Max Magnification
0.26x
0.18x
Min Focus Distance
180 mm / 7.09 in
400 mm / 15.75 in

Production

Accessory
Lens hood included
Lens hood included
Debut
2021-10-21
2017-10-26

Reviews

Neofiliac score
76%
68%
Pros
  • Weather-sealed
  • Great image quality
  • 8-bladed aperture for sunstars
  • Bright maximum aperture
  • Weather-sealed
  • Very sharp
Cons
  • On the heavy side
  • Slow autofocus

Price

Offers (incl. referral links)
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