neuroanatomist said:
Mt Spokane Photography said:
The out of date rule, 1/shutter speed was updated by Canon to suggest that 1 / 2 X shutter speed be used for modern high MP sensors and non-IS lenses. For a 24 mp APS-C or 5DS, I'd use 1 / 3 X shutter speed when possible.
Interesting that Canon changed their recommendation. I wonder if they have/will alter the firmware for newer cameras accordingly, to use faster shutter speeds in Av than 1/FL for FF and 1/(1.6xFL) for APS-C. I've always found it interesting that Canon ignores IS when selecting a shutter speed in Av.
They started offering the feature when the 7D MK II was introduced, but its not well known and not intuitive. Its on the high end bodies, not on my SL2.
I set my 5D MK IV to +1. At 100mm and "0", it sets a shutter speed of 1/100 sec, at 100mm and +1, it sets a shutter speed of 1/160 sec, at 100mm and +2, it sets 1/320 sec, and at 100mm and +3, it sets 1/640 sec. You can set it to slow shutter speeds the same way.
NEW: User-controllable “Auto” for minimum shutter speed with Auto ISO Another option for pre-setting the minimum shutter speed before Auto ISO goes to a higher ISO setting is “Auto.” In the past, this was simply 1/ lens focal length, and with standard or wide-angle lenses, the resulting slow shutter speeds sometimes meant speeds that were dangerously close to risking blurs from subject or camera movement. Think about it — in a fast-paced situation, such as (for instance) indoor wedding candids with a 16-35mm lens, do you really want speeds dropping as low as 1/15th of a second?
EOS 7D Mark II now offers a 7-step scale, to further fine-tune what the camera will do when you’ve set Auto for minimum shutter speed. It still uses 1/ lens focal length as the base, but with considerable adjustability. Three settings on the “+” side allow you to dial-in 1, 2 or 3 stops faster shutter speeds than whatever your current 1/ lens focal length setting is. And the “–” settings allow up to 3 stops slower speeds, for instances where you’re using Image Stabilization, or are otherwise confident that slower shutter speeds will be the right answer for you.
Particularly when working with zoom lenses having an extensive zoom range, the Auto setting gives flexibility to work with Auto ISO, and have appropriate shutter speeds for your longer focal lengths, and still allow for reduced — but safe — speeds at wide zoom settings.