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Canon EF 20mm f/2.8 USM on Canon EOS 7D vs Sigma 17-50mm F2.8 EX DC OS HSM Canon on Canon EOS 7D vs Sigma 17-70mm F2.8-4 DC MACRO OS HSM C Canon on Canon EOS 7D
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DXOMARK Score |
|
| Best at f=20mm & f/4 [?] | 13
|
Lens Metric Scores | |
|
Sharpness
[?]
|
8 P-Mpix
|
|
Transmission
[?]
|
3.1 TStop
|
|
Distortion
[?]
|
0.5 %
|
|
Vignetting
[?]
|
-1.2 EV
|
|
Chr. aberration
[?]
|
10 µm
|
DXOMARK Score |
|
| Best at f=21mm & f/2.8 [?] | 16
|
Lens Metric Scores | |
|
Sharpness
[?]
|
8 P-Mpix
|
|
Transmission
[?]
|
3.1 TStop
|
|
Distortion
[?]
|
0.3 %
|
|
Vignetting
[?]
|
-0.7 EV
|
|
Chr. aberration
[?]
|
11 µm
|
DXOMARK Score |
|
| Best at f=24mm & f/3.2 [?] | 15
|
Lens Metric Scores | |
|
Sharpness
[?]
|
9 P-Mpix
|
|
Transmission
[?]
|
4 TStop
|
|
Distortion
[?]
|
0.4 %
|
|
Vignetting
[?]
|
-0.7 EV
|
|
Chr. aberration
[?]
|
6 µm
|
| Announced | 01/06/1992 |
| Indicative price (USD) | 514 |
| Aperture | f/ 2.8 |
| Focal range (mm) | 20 |
| Filter diameter (mm) | 72 |
| Max diameter (mm) | 77.5 |
| Mount type | Canon EF |
| Stabilization | No |
| AF Motor | USM |
| Zoom type | / |
| Rotating front element | No |
| Tripod mount | No |
| Color | Black |
| Full-Time manual focus | Yes |
| Number of lenses | 11 |
| Number of groups | 9 |
| Diaphragm blades | 6 |
| Circular aperture | No |
| Length (mm) | 70.6 |
| Weight (gr) | 405 |
Certain fields may be left blank. They will be updated as soon as possible.
| Announced | 01/02/2010 |
| Indicative price (USD) | 669 |
| Aperture | f/ 2.8 |
| Focal range (mm) | 17-50 |
| Filter diameter (mm) | 77 |
| Max diameter (mm) | 83.5 |
| Mount type | Canon EF-S |
| Stabilization | OS |
| AF Motor | HSM |
| Zoom type | Ring |
| Rotating front element | No |
| Tripod mount | No |
| Color | Black |
| Full-Time manual focus | No |
| Number of lenses | 17 |
| Number of groups | 13 |
| Diaphragm blades | 7 |
| Circular aperture | No |
| Length (mm) | 91.8 |
| Weight (gr) | 565 |
Certain fields may be left blank. They will be updated as soon as possible.
| Announced | 17/09/2012 |
| Indicative price (USD) | 499 |
| Aperture | f/ 2.8-4 |
| Focal range (mm) | 17-70 |
| Filter diameter (mm) | 72 |
| Max diameter (mm) | 79 |
| Mount type | Canon EF-S |
| Stabilization | Yes |
| AF Motor | HSM |
| Zoom type | Ring |
| Rotating front element | No |
| Tripod mount | No |
| Color | Black |
| Full-Time manual focus | No |
| Number of lenses | 16 |
| Number of groups | 14 |
| Diaphragm blades | 7 |
| Circular aperture | Yes |
| Length (mm) | 82 |
| Weight (gr) | 470 |
Certain fields may be left blank. They will be updated as soon as possible.
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