NormanPCN wrote: garyvot wrote:
That\'s because the whole concept of \'auto\' and \'manual\' don\'t go together. You can\'t tell the camera to vary the ISO speed automatically, then expect it to hold the ISO speed invariant while you change the aperture or shutter speed, as if it somehow should magically know what you want.
You\'d have to have some form of exposure compensation setting, but for ISO speed. As there is no physical way to apply exposure compensation in manual mode (the QCD is taken), exactly how would you tell the camera to \"compensate\" the ISO speed setting? Canon would have to add an entirely new exposure compensation mechanism to its camera bodies for this, similar to FEC.
I\'m not convinced it\'s a worthwhile effort, with all the ways photographers already have to make exposures... but maybe I\'m just too old school.
\"Manual\" mode is called manual due to legacy. Nothing was auto selected. User selected aperture and shutter. Now we have film that can change ISO on a whim, and photographers like and want to change their ISO, and in situations where a menu selection is too slow.
No need for a new EC feature. The existing one applies exactly as it applies to Av and Tv, the legacy auto exposure modes. M with auto ISO is an auto exposure mode. EC is necessary for auto exposure modes.
With fully manual M, the meter just told you if you were over/under exposed and you adjusted to \'0\'. With auto ISO in M the camera tries to keep exposure at \'0\' by adjusting ISO. EC just skews what the meter is trying to zero to. Simple and logical and no different than what is going in with Av and Tv. The diff is two manual params versus only one.
No need for a new mode on the dial as such a new mode, aperture+shutter priority, implies auto ISO.
That fact that Canon does not allow EC in auto ISO M mode is just legacy, manual means \"manual\" thinking.
M with auto ISO should enjoy all the rights and privileges of the other auto exposure modes. Even Av is changed with auto ISO. Some complain the camera is to quick to bump ISO versus dropping shutter.
-Norman
Thanks, but I already get it.
My point was there is no physical control on the camera that one can use to enter exposure compensation in Manual exposure mode. In auto modes, the Quick Control Dial is used to apply EC, but in Manual it is use to adjust the aperture while the Main Dial is used for the shutter speed--unless you\'ve swapped them.
Hence Canon would need to add a dedicated input method just for this mode, something like FEC but for ISO.
Alternatively, they could \'overload\' the function of the Main Dial so that you could access both aperture and shutter speeds there via a mode toggle (hold a rear button or--ha!--use the ISO button ). This is easier than designing a new dedicated control but it would inject operational inconsistency when changing shooting modes. Either way would change up how the camera works in a fundamental way.
Maybe the added complexity is worth it, but if I were a product planner I\'d want to make certain that there was wide interest in this scenario (and that the existing solution proved insufficient) before committing to changing the core ergonomics in such a way.
Jun 29, 2012 at 09:44 PM
Previous versions of garyvot's message #10765433 « topics you wish would die... :) »
). This is easier than designing a new dedicated control but it would inject operational inconsistency when changing shooting modes. Either way would change up how the camera works in a fundamental way.