Compare Pentax DA 15mm F4 vs Pentax-FA 31mm F1.8
Construction
Aperture Blades
9 blades, Rounded aperture diaphragm
9 blades
Colors
Black, Silver
Black, silver
Form Factor
Ultra Wide-Angle Prime Lens
Wide-Angle Prime Lens
Image Size
APS-C
Full-Frame
Lens Barrel
Distance scale, DoF scale
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Pentax K-mount
Pentax K-mount
Material
Aluminum
Motor
Screw drive from camera
Screw drive from camera
Optical Formula | Elements
8 elements
9 elements
Optical Formula | Groups
6 groups
7 groups
Optical Formula | Special Glass
1 Hybrid aspherical element, 1 ED glass element, High-grade multi-layer HD (High Definition) Coating groups
HD + Super Protect coatings groups
Dimensions
Filter Diameter
49 mm / 1.93 in
58 mm / 2.28 in
Size | Diameter
63 mm / 2.48 in
65 mm / 2.56 in
Size | Length
40 mm / 1.57 in
69 mm / 2.72 in
Weight
189 g / 6.68 oz
341 g / 12.05 oz
Function
Angle Of View
87.8° Diagonal | 77.3° Horizontal | 56.1° Vertical
69.9° Diagonal | 60.3° Horizontal | 42.3° Vertical
Aperture
f/4 ~ f/22
f/1.8 ~ f/22
Autofocus
Yes
Yes
Crop Factor
1.5
Focal Length
15 mm
31 mm
Focal Length (35mm Equivalent)
22.5 mm
Focus Type
Unit
Internal
Image Stabilization
No
No
Weather Resistance
No
Performance
Max Magnification
0.15x
0.16x
Min Focus Distance
180 mm / 7.09 in
300 mm / 11.81 in
Production
Accessory
Lens Hood: built-in hood (supplied)
Lens hood included
Debut
2013-08-27
2021-02-24
Reviews
Neofiliac score
59%
50%
Pros
- Exceptionally light and compact
- Good weather resistance
- Comes with physical aperture ring
- Beautifully built
Cons
- Not the highest IQ level
- Only f/1.8 for the price
- Lacks weather sealing
- Unusual focal length
Remove
Remove
Related Products
Add up to 4 products to the comparison using the search bar above
Information on this page is provided on an as-is basis. No warranty on accuracy is implied. This page may contain affiliate links to third-party merchants such as Amazon and eBay. If you make a purchase using the supplied link, we may receive a commission. Neofiliac places the utmost respect for your privacy. We use no cookie whatsoever beyond that needed for the proper functioning of the website.