Questions on electronic first curtain shutter
Posted: Fri Mar 30, 2012 2:58 am
I am curious on the relationship between the Sony Alpha and Canon electronic first curtain shutters. I found the article below that has some information on the Canon electronic first curtain shutters.
I assume the 60D and The T3i must also have an electronic first curtain shutter, but those DSLRs are not included in the article. I understand from the article that the electronic first curtain shutter is only available in Canon live-view modes. I'd like to know, if this is similar mechanics as found in the Alpha A77, A65, A55, and A57. Please tell me if I am correct, that in the Alpha line, the electronic first curtain shutter is user selectable, and available in all modes, not just in live-view.
Excerpt from: http://krebsmicro.com/Canon_EFSC/index.html
Canon “Live-View” with an electronic first shutter curtain.
Many Canon DSLRs with the “live-view” feature have an interesting feature. They can eliminate the need for a mechanical first shutter curtain by using “a unique high-speed scanning and electronic reset system that accurately mimics the... high-speed mechanical shutter operation. It synchronizes with the mechanical 2nd-curtain shutter to obtain a slit exposure.” In addition, the way live-view has been incorporated in these camera bodies the exposure can be initiated while in “live-view” without any mirror motion. As a result, an exposure can begin with absolutely no mechanical movement at all, and thus no vibration. The exposure is concluded by the closing of the mechanical second shutter curtain. After the exposure there will be some mechanical movement in the camera but this obviously can not effect the exposure (with the possible exception of a continuous “burst” of successive pictures).
Thanks,
George
I assume the 60D and The T3i must also have an electronic first curtain shutter, but those DSLRs are not included in the article. I understand from the article that the electronic first curtain shutter is only available in Canon live-view modes. I'd like to know, if this is similar mechanics as found in the Alpha A77, A65, A55, and A57. Please tell me if I am correct, that in the Alpha line, the electronic first curtain shutter is user selectable, and available in all modes, not just in live-view.
Excerpt from: http://krebsmicro.com/Canon_EFSC/index.html
Canon “Live-View” with an electronic first shutter curtain.
Many Canon DSLRs with the “live-view” feature have an interesting feature. They can eliminate the need for a mechanical first shutter curtain by using “a unique high-speed scanning and electronic reset system that accurately mimics the... high-speed mechanical shutter operation. It synchronizes with the mechanical 2nd-curtain shutter to obtain a slit exposure.” In addition, the way live-view has been incorporated in these camera bodies the exposure can be initiated while in “live-view” without any mirror motion. As a result, an exposure can begin with absolutely no mechanical movement at all, and thus no vibration. The exposure is concluded by the closing of the mechanical second shutter curtain. After the exposure there will be some mechanical movement in the camera but this obviously can not effect the exposure (with the possible exception of a continuous “burst” of successive pictures).
Thanks,
George