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Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR on Pentax K-3 vs Nikon AF-S NIKKOR 18-35mm f/3.5-4.5G ED on Nikon D7100 vs Canon EF 17-40mm f/4L USM on Canon EOS 7D
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DXOMARK Score |
|
| Best at f=30mm & f/3.5 [?] | 17
|
Lens Metric Scores | |
|
Sharpness
[?]
|
9 P-Mpix
|
|
Transmission
[?]
|
3.6 TStop
|
|
Distortion
[?]
|
0.4 %
|
|
Vignetting
[?]
|
-1 EV
|
|
Chr. aberration
[?]
|
7 µm
|
DXOMARK Score |
|
| Best at f=24mm & f/4 [?] | 20
|
Lens Metric Scores | |
|
Sharpness
[?]
|
11 P-Mpix
|
|
Transmission
[?]
|
4.3 TStop
|
|
Distortion
[?]
|
0.4 %
|
|
Vignetting
[?]
|
-0.7 EV
|
|
Chr. aberration
[?]
|
7 µm
|
DXOMARK Score |
|
| Best at f=24mm & f/4 [?] | 13
|
Lens Metric Scores | |
|
Sharpness
[?]
|
8 P-Mpix
|
|
Transmission
[?]
|
4.4 TStop
|
|
Distortion
[?]
|
0.2 %
|
|
Vignetting
[?]
|
-0.5 EV
|
|
Chr. aberration
[?]
|
6 µm
|
| Announced | 07/11/2013 |
| Indicative price (USD) | 1000 |
| Aperture | f/ 2.8-4 |
| Focal range (mm) | 20-40 |
| Filter diameter (mm) | 55 |
| Max diameter (mm) | 71 |
| Mount type | Pentax KAF |
| Stabilization | No |
| AF Motor | DC Motor |
| Zoom type | Ring |
| Rotating front element | |
| Tripod mount | No |
| Color | Black, Silver |
| Full-Time manual focus | |
| Number of lenses | 9 |
| Number of groups | 8 |
| Diaphragm blades | 9 |
| Circular aperture | Yes |
| Length (mm) | 68.5 |
| Weight (gr) | 283 |
Certain fields may be left blank. They will be updated as soon as possible.
| Announced | 29/01/2013 |
| Indicative price (USD) | 750 |
| Aperture | f/ 3.5-4.5 |
| Focal range (mm) | 18-35 |
| Filter diameter (mm) | 77 |
| Max diameter (mm) | 83 |
| Mount type | Nikon F FX |
| Stabilization | No |
| AF Motor | Yes |
| Zoom type | Ring |
| Rotating front element | |
| Tripod mount | No |
| Color | Black |
| Full-Time manual focus | |
| Number of lenses | 12 |
| Number of groups | 8 |
| Diaphragm blades | 7 |
| Circular aperture | Yes |
| Length (mm) | 95 |
| Weight (gr) | 385 |
Certain fields may be left blank. They will be updated as soon as possible.
| Announced | 01/05/2003 |
| Indicative price (USD) | 780 |
| Aperture | f/ 4 |
| Focal range (mm) | 17-40 |
| Filter diameter (mm) | 77 |
| Max diameter (mm) | 83.5 |
| Mount type | Canon EF |
| Stabilization | No |
| AF Motor | USM |
| Zoom type | Ring |
| Rotating front element | No |
| Tripod mount | no |
| Color | Black |
| Full-Time manual focus | Yes |
| Number of lenses | 12 |
| Number of groups | 9 |
| Diaphragm blades | 7 |
| Circular aperture | Yes |
| Length (mm) | 96.8 |
| Weight (gr) | 475 |
Certain fields may be left blank. They will be updated as soon as possible.
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