就镜头开发而言，佳能已经全力以赴，因为专利局已经出现了大量的光学设计专利。
这些是最新的EF卡口光学设计。它们可能是Cinema系列电影镜头，因为它们更受到关注。
日本专利申请2019-066585
佳能EF 16mm f / 1.4
焦距16.40mm 16.36mm 16.21mm
F值1.45 1.45 1.45
半场角52.84°52.84°52.84°
图像高度21.64mm 21.64mm 21.64mm
镜头全长98.97mm 98.65mm 97.42mm
BF 38.50mm 38.83mm 40.05mm
佳能EF 20mm f / 1.4
焦距20.50mm 20.45mm 20.26mm
F值1.45 1.45 1.45
半场角46.54°46.54°46.54°
图像高度21.64mm 21.64mm 21.64mm
镜头全长100.04 99.55 97.71
BF 38.32mm 38.81mm 40.64mm
佳能EF 14mm f / 1.8
焦距14.40mm 14.38mm14.29mm
F值1.83 1.83 1.83
半场角56.35°56.35°56.35°
图像高度21.64mm 21.64mm 21.64mm
镜头全长88.57mm 88.32mm 87.42mm
BF 38.79mm 39.04mm 39.94mm
佳能16mm f / 1.8
焦距16.04mm 16.00mm 15.86mm
F值1.83 1.83 1.83
半场角53.45°53.45°53.45°
图像高度21.64mm 21.64mm 21.64mm
镜头全长94.99 94.67 93.46
BF 38.80mm 39.13mm 40.33mm
佳能EF 17mm f / 1.8
焦距17.16mm 17.14mm 17.06mm
F值1.83 1.83 1.83
半场角51.58°51.58°51.58°
图像高度21.64mm 21.64mm 21.64mm
镜头全长90.00mm 89.66mm 88.39mm
BF 40.51mm 40.86mm 42.12mm
佳能18mm f / 1.8
焦距18.81mm 18.75mm 18.52mm
F值1.83 1.83 1.83
半场角48.99°48.99°48.99°
图像高度21.64mm 21.64mm 21.64mm
镜头全长93.37mm 93.37mm 93.37mm
BF 39.52mm 39.52mm 39.52mm
日本专利申请2019-066586
佳能EF 18mm f / 1.4
焦距18.52mm 18.46mm 18.25mm
F值1.31 1.31 1.31
半场角49.44°49.53°49.85°
图像高度21.64mm 21.64mm 21.64mm
镜头全长106.98mm 106.51mm 104.95mm
BF 38.97mm 39.44mm 41.00mm
佳能EF 20mm f / 1.4
焦距20.50mm 20.45mm 20.26mm
F值1.45 1.45 1.45
半场角46.54°46.54°46.54°
图像高度21.64mm 21.64mm 21.64mm
镜头全长100.04mm 99.55mm 97.71mm
BF 38.32mm 38.81mm 40.65mm
佳能EF 14mm f / 1.8
焦距14.69mm 14.68mm 14.64mm
F值1.85 1.85 1.85
半场角55.82°55.85°55.91°
图像高度21.64mm 21.64mm 21.64mm
镜头全长104.15mm 103.78mm 102.95mm
BF 38.33mm 38.70mm 39.53mm
佳能EF 22mm f / 1.2
焦距22.6mm 22.60mm 22.20mm
F值1.24 1.24 1.25
半场角43.63°43.75°44.27°
图像高度21.64mm 21.64mm 21.64mm
镜头全长107.46mm，106.9mm，104.5mm
BF 38.32mm 38.88mm 41.28mm
佳能EF 24mm f / 1.2
焦距24.10mm 24.03mm 23.69mm
F值1.24 1.24 1.24
半场角41.92°42.00°42.40°
图像高度21.64mm 21.64mm 21.64mm
镜头全长108.28mm 107.72mm 104.96mm
BF 38.33mm 38.89mm 41.65mm
文章来源：Patent: Lots of optical formula lens patents for the EF mount
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