Originally posted by OJGoreng Correct me if I'm wrong, but in manual mode you operate on a fixed ISO
You are wrong. In manual mode you operate without the camera overriding your decisions on exposure parameters, but ISO is just as adjustable as shutter and aperture. (On a camera where ISO is adjustable at all, but that's what we are talking about here.)
Originally posted by OJGoreng so there's only two variables left; if you change one, the're only one solution for the other to give you the correct exposure (i.e. you only have one degree of freedom). If you change the ISO while locking the exposure, either aperture or shutter speed (or both) will have to change to yield the correct exposure. The camera doesn't know which one you'd like to change, so your expectation isn't necessarily the obvious one (another user might expect the aperture, but not the shutter speed to change when you change ISO while locking the exposure). I guess that's why it doesn't work.
I may have made my explanation too short. I felt I had to make it short in order to get it read. Obviously the camera will adjust either shutter or aperture based on the general user preference (which already has a custom setting, as Class A points out). The important part is that when I set the camera in a mode where it promises to not change the image brightness it should honour that promise.
Originally posted by OJGoreng So in other words you'd like the behaviour of the camera to be programmable when you change the ISO in manual mode? I'm all for customiseable firmware, although I'd imagine it would be easiest to implement with a piece of software you'd run on a computer and then transfer to the camera, otherwise it might take an endless range of pages to click through with the wheels and buttons on the camera itself. (And since I have no use for a FF, I'd love to see this implemented in the crop sensor models as wel
). Something tells me this will greatly increase the chance of user error, though, which might be a reason why it hasn't been implemented so far.
There will be no new preferences. No changes beyond honouring the already existing user prefences also in this case.
But I would actually love to be able to customise my firmware properly. In the sense of getting source and build instructions. But I'm sure that won't happen from a traditional camera company. (There are cameras running Android where you get source.)
Originally posted by reh321 I don't believe that is a bug. That is standard camera behavior. Allowing the camera to change ISO at all on its own is a fairly new behavior, so people may decide over time that they want something like this, but I think a lot of thought would have to go into what your suggested behavior look like at the very detail level.
Not all common defects are features, and this is definitely a bug.
Perhaps I wasn't clear enough on what I expect, but I don't know how to be clearer. I just want the totally simple, obvious thing: When exposure is locked, the camera does not change the exposure. It's not a new idea, it's not complicated.