Pippan wrote in post #19491958
Yes D, that is what I want (not that I'll get it any time). I've been shooting for decades and am quite good at setting the three parameters in full manual myself, so that my exposures are as far to the right as possible without clipping any highlights other than speculars. I'm sure you're aware of the reasons. I just find the meter too often over or under exposes. These days I shoot mostly birds. Most birds have some white on them. The whites on the bird are usually the brightest thing in the frame and I don't want to clip them. So I set exposure for just less than clipping whites. If I leave it to the meter with one or more parameters in auto, as the bird flies from a dark background past a light background the meter will tell the camera to alter the exposure, either under or over-exposing it. With my full manual setting, the bird stays properly exposed regardless of the background (unless it flies from sun into shade for example). But if I want to quickly change shutter speed, aperture or ISO, say to close down aperture to increase DOF on a flock of birds or to decrease shutter speed if a perched bird takes off, without changing overall exposure, my imaginary Ev setting would change another setting to maintain overall exposure.
But I suppose, thinking it through, there'd be times when the bird
does fly from sun into shade and I need to quickly increase exposure by 4 stops, then I'd have to have some way of telling the camera that this time I
do want to change exposure. I don't know how that would work.
Sorry for the ramble, I'm just thinking out loud. At least with the R7 it's easy to quickly change any of the three parameters with a single action (shutter front wheel, ISO back wheel, aperture control ring) so I can maintain exposure, or change it, with any of these controls. So yes, thinking it through, I guess it is fine as it is.
Re Fv, at first I couldn't understand the point of it and although I now understand better how it works I still can't really see the point of it, as to change any parameter requires two actions (one to select the parameter, another to change it), rather than one (by turning a wheel or ring). I suppose if you use an auto setting and exposure compensation, which introduces a fourth setting for which there is no direct control, then it could be useful.
Once again, sorry for the ramble, I may not be making much sense.
From the way I understand things, you want to dial in an exposure then have that light level aka exposure maintained even if you change one of the parameters. To me it is only a firmware upgrade away to be able to program a button to lock the exposure. Set Tv, Av and ISO then press lock. Should be doable.
Rod
