Canon EF 20 mm f/2.8 USM
11. Summary
- solid casing,
- excellent resolution in the frame centre,
- very well corrected astigmatism,
- decently controlled coma,
- silent, quick and accurate autofocus.
Cons:
- average image quality at the frame edge,
- a bit too high chromatic aberration,
- huge vignetting even on an APS-C sensor,
- weak work against bright light.
Our tests are supposed to answer one main question - whether or not a given instrument is worth buying. In the case of the Canon EF 2.8/20 mm the answer is unambiguous – it isn’t! Spending almost 500 $ we get picture effects that are possible to achieve using cheaper and much more universal lenses like a Tamron 17-50 f/2.8 or a Sigma 18-50 f/2.8. If the difference is not visible why should you overpay?
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Sample shots:
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| Camera: Canon 20D Parameters: 20 mm, f/11, exp. 1/500 sek., ISO 400 File: JPG, 3504x2336 pix, 1.9 MB |
Camera: Canon 20D Parameters: 20 mm, f/5.0, exp. 1/400 sek., ISO 200 File: JPG, 3504x2336 pix, 4.0 MB |
Camera: Canon 20D Parameters: 20 mm, f/2.8, exp. 1/200 sek., ISO 200 File: JPG, 3504x2336 pix, 3.2 MB |
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Camera:Canon 20D Parameters: 20 mm, f/8.0, exp. 1/250 sek., ISO 200 File: JPG, 3504x2336 pix, 3.1 MB |
Camera:
Canon 20D Parameters: 20 mm, f/2.8, exp. 1/50 sek., ISO 400 File: JPG, 3504x2336 pix, 2.3 MB |
Camera:
Canon 20D Parameters: 20 mm, f/2.8, exp. 1/80 sek., ISO 100 File: JPG, 3504x2336 pix, 2.1 MB |
