New Patent: Canon EF-S 20mm f/2.8 STM Lens
Canon has filed a new patent: Canon EF-S 20mm f/2.8 STM Lens. Up to now, Canon 20mm f/2.8, 24mm f/2.8, 28mm f/2.8, 50mm f/2.8 have been affordable prime lens lineup. And the 20mm f/2.8, 24mm f/2.8, 50mm f/2.8 tune into STM.
Patent Publication No. 2015-111192 (Google Translated)
- Published 2015.6.18
- Filing date 2013.12.6
Example 3
- Focal length 20.65mm
- Fno. 2.88
- Half angle of view ω = 33.48 °
- Image height Y = 13.66mm
- Overall length of the lens 64.00mm
- BF 35.30mm
Canon patents
- Negative ShiboTadashi
- The pay-out the entire
Source: egami
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