EOS-M 新鏡專利: EF-M 18-40

新鏡規格
焦段18-40
光圈F3.5-5.6
可能有IS
預計為餅乾鏡

雖然目前只是專利申請而已
不過將來只要市場夠大
相信未來EF-M鏡的陣容會逐漸豐富起來

現行的EF-M三鏡都蠻合我意的
所以如果這支新餅乾鏡未來上市成真的話我應該也會買單

消息來源 CR


內文:
A patent showing an EF-M 18-40 f/3.5-5.6 pancake has come to light. With this patent a bunch of other optical formulas also appear, such as an 18-55 pancake, 10-20, and a 9-18. We currently have an EF-M 11-22, which is probably rooted from the latter two optical formulas.

A zoom pancake would be a nice addition to the geographically fragmented and oddly marketed EOS M line.
◾Patent Publication No. 2014-6275
◾Publication date 2014.1.16
◾Filing date 2012.6.21

◾Example 7
◾Zoom ratio 3.00
◾Focal length f = 18.10-37.01-54.30mm
◾Fno. 4.20-6.20-8.20
◾Half angle ω = 36.92-20.17-14.06 °
◾Image height Y = 13.60mm
◾64.74-56.63-62.13mm lens length
◾BF 0.50mm

◾Canon patents
◾The possible vibration damping by the second lens group
◾Feeding whole, front focus, focusing, rear focusing, etc.