Site Title

Compare PENTAX-D FA 15-30mm F2.8 vs Pentax-D FA 21mm F2.4ED vs Pentax-D FA* 85mm F1.4

Reviews

Neo score
31%
76%
68%
Pros
  • Constant f/2.8 aperture
  • Great optical performance
  • Weather-sealed
  • Beautifully constructed
  • Weather-sealed
  • Great image quality
  • 8-bladed aperture for sunstars
  • Bright maximum aperture
  • Weather-sealed
  • Premium design and construction
Cons
  • Rather long
  • On the heavy side
  • Lacks front filter thread
  • Large diameter
  • On the heavy side

Price

MSRP
1350 USD
1400 USD
Offers (incl. referral links)

Construction

Aperture Blades
9 blades
8 blades, Rounded diaphragm
9 blades
Colors
Black
Black, Silver
Black
Form Factor
Ultra Wide-Angle Zoom Lens
Ultra Wide-Angle Prime Lens
Short Telephoto Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Distance scale
Distance scale, DoF scale
Distance scale
Lens Mount
Pentax K-mount
Pentax K-mount
Pentax K-mount
Material
Aluminum
Motor
Ultrasonic
Ring-type ultrasonic
Optical Formula | Elements
18 elements
11 elements
12 elements
Optical Formula | Groups
13 groups
8 groups
10 groups
Optical Formula | Special Glass
Three ED and aspherical elements + HD and SP coatings groups
4 ED elements, 1 Super ED element groups
1 aspherical + 3 Super ED elements, HD coating groups

Dimensions

Filter Diameter
67 mm / 2.64 in
82 mm / 3.23 in
Size | Diameter
99 mm / 3.90 in
74 mm / 2.91 in
95 mm / 3.74 in
Size | Length
144 mm / 5.67 in
89 mm / 3.50 in
124 mm / 4.88 in
Weight
1040 g / 36.75 oz
416 g / 14.70 oz
1255 g / 44.35 oz

Function

Angle Of View
110.6° Diagonal | 100.4° Horizontal | 77.3° Vertical (wide) ~ 71.6° Diagonal | 61.9° Horizontal | 43.6° Vertical (tele)
91.7° Diagonal | 81.2° Horizontal | 59.5° Vertical
28.6° Diagonal | 23.9° Horizontal | 16.1° Vertical
Aperture
f/2.8 ~ f/22
f/2.4–22 ~ f/2.4–22
f/1.4 ~ f/16
Autofocus
Yes
Yes
Yes
Focal Length
15 mm ~ 30 mm
21 mm
85 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
Yes
Yes
Yes

Performance

Max Magnification
0.2x
0.26x
0.12x
Min Focus Distance
280 mm / 11.02 in
180 mm / 7.09 in
850 mm / 33.46 in

Production

Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2016-02-17
2021-10-21
2020-05-27
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