佳能鏡頭光圈環專利 !! 更新專利 Canon 100-400mm F4-5.6

netvictor

http://www.photographybay.com/20 ... gs-for-hdslr-video/



佳能單反拍攝視頻的任何人都承認，順利的拉是不可能的，而佳能的EF鏡頭的錄製。在後期更有趣的專利申請，佳能透露，這是新鏡頭光圈環調整光圈設置在視頻採集工作。光圈環的新鏡頭，採用電子控制，鏡頭中的光圈，而不是昔日的機械光圈環。



Anyone who has shot video with a Canon DSLR recognizes that smooth iris pulls are impossible while recording with Canon’s EF lenses.  In one of the more interesting patent applications of late, Canon revealed that it is working on new lenses with aperture rings for adjusting aperture settings during video capture.The new lenses with aperture rings utilize electronic control of the lens diaphragm rather than a mechanical aperture ring of yesteryear.

並不完全清楚的是，通過鏡頭環的光圈調整與否將提供無級光圈。此功能不解決在專利申請中。不過，推定是在視頻拍攝的新鏡頭，光圈調整設計，將提供更平滑的變化比我們擺脫現在從相機機身的調整可怕的1/3-stop點擊。

新鏡頭的設計之間的短片拍攝，仍然捕捉分離出來的光圈調整。在拍攝電影時，光圈的變化是通過鏡頭環。鏡子，拍攝靜態圖像時，光圈的變化是通過相機機身。這種“三權分立”的建議，光圈調整將在視頻採集足夠光滑，實際使用。還有許多其他功能，可以將這些鏡頭（內置例如，編程/遠程集中拉，平滑/慢的自動對焦調整等）;，但是，該專利申請被限制到一個特定的功能集綁到這個新的光圈環。發生，我對這個新的鏡頭系統讀取時的另一個問題是，是否新的鏡頭微處理器可以有效地溝通，這樣的HDSLRs目前佳能 5DMark II的和7D。佳能能夠使這些鏡頭通過這些舊型號的固件更新兼容嗎 ？

作為最後的思想，這是可能的，這種新的鏡頭類型，將部分佳能即將推出的視頻相關公告，11月 3日。

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What’s not entirely clear is whether or not the aperture adjustments via the lens ring will offer step-less iris pulls.  This feature is not addressed in the patent application. However, the presumption is that a new lens design for iris adjustments during video capture would offer much smoother changes than the terrible 1/3-stop clicks we get now out of the adjustments from the camera body.The new lens design separates aperture adjustments between movie capture and still capture.  When capturing movies, aperture changes are made via the lens ring.  When the mirror is down and capturing still images, aperture changes are made via the camera body.  This “separation of powers” suggests that aperture adjustments will be smooth enough for practical usage during video capture.There are also numerous other features that could be built into these lenses (e.g., programmed/remote focus pulls, smoother/slower AF adjustments, etc.); however, this patent application was limited to a specific feature-set tied to this new aperture ring.Another question that occurred to me while reading about this new lens system is whether the new lens MPU can effectively communicate with current Canon HDSLRs like the 5D Mark II and 7D.  Will Canon be able to make these lenses compatible via firmware updates to these older models?

As a final thought, it’s possible that this new lens type will be part of Canon’s upcoming video-related announcement on November 3.

更新專利 Canon 100-400mm F4-5.6

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