Compare Pentax-DA 20-40mm F2.8-4 vs Pentax DA 16-85mm F3.5-5.6
Construction
Aperture Blades
9 blades, Rounded aperture
7 blades, Rounded aperture
Colors
Black, silver
Black
Form Factor
Standard Zoom Lens
Standard Zoom Lens
Image Size
APS-C
APS-C
Lens Barrel
Distance scale, DoF scale
Lens Mount
Pentax K-mount
Pentax K-mount
Material
Aluminium barrel
Motor
Micromotor
Optical Formula | Elements
9 elements
16 elements
Optical Formula | Groups
8 groups
12 groups
Optical Formula | Special Glass
1 ED glass element, 1 SLD glass element, HD coating groups
HD, Super Protect coatings groups
Dimensions
Filter Diameter
55 mm / 2.17 in
72 mm / 2.83 in
Size | Diameter
71 mm / 2.80 in
78 mm / 3.07 in
Size | Length
69 mm / 2.72 in
94 mm / 3.70 in
Weight
283 g / 10.00 oz
488 g / 17.24 oz
Function
Angle Of View
71.6° Diagonal | 61.9° Horizontal | 43.6° Vertical (wide) ~ 39.7° Diagonal | 33.4° Horizontal | 22.6° Vertical (tele)
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical (wide) ~ 19.3° Diagonal | 16.1° Horizontal | 10.8° Vertical (tele)
Aperture
f/2.8–4 ~ f/22–32
f/3.5–5.6 ~ f/22–38
Autofocus
Yes
Yes
Crop Factor
1.5
1.5
Focal Length
20 mm ~ 40 mm
16 mm ~ 85 mm
Focal Length (35mm Equivalent)
30.0 mm ~ 60.0 mm
24.0 mm ~ 127.5 mm
Focus Type
Extending front
Image Stabilization
No
No
Weather Resistance
Yes
Yes
Zoom Type
External zoom
External zoom
Performance
Max Magnification
0.2x
0.26x
Min Focus Distance
280 mm / 11.02 in
350 mm / 13.78 in
Production
Accessory
Lens Hood: MH-RA55 (supplied)
Lens Hood: PR-RBA72 (supplied)
Debut
2013-11-06
2014-10-29
Reviews
Neofiliac score
50%
50%
Pros
- Weather-sealed
- Beautiful construction for manual focusing
- Weather-sealed
Cons
- External zoom without zoom lock
- Not the most interesting focal range
- Not the best image quality
- Not the best build from Pentax
- External zoom without zoom lock
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.