At least we know that PhotoscapeX doesn't mutilate exif data.
According to exif viewer, you use Program Auto
Exposure mode.
I remember trying it out once to see 'what it did' .. more accurately 'see how it worked'.(on my Nikons)
Confused the bejeezus out of me quickly. No idea what it was trying to do .. I think maybe similar results happen in
Canon circles too.
exif say:
" Auto
ISO : 100"
and
"Base
ISO : 1037"
In the maker notes section.
I read that as maybe AutoISO is programmed to start at ISO100 in the camera or something when in AutoISO mode.
But Base
ISO in that field obviously implies that
ISO was set to ISO1000 for that shot(and the assumption is that for all other similarly done shots .. ie. the bracketed ones .. they too were all set to ISO1000.
Do you still have the 40D? .. or using something else now?
Interesting to then compare with one of the non bracketed shots exif data too now.
The question is; did you consciously then set camera to
Aperture Priority for the single shots .. did you set it to Program AE for the bracketed shots .. etc, etc.
Did you somehow set up some type of memory system in camera whereby the camera used those settings when set to that memory bank, and then switch to another memory bank.
But the
exposure mode used for this shot is definitely Program AE or [P] on the camera .. so yep.
The only two reasons it held
ISO value so high up and
shutter and
aperture variables at strange settings must be that it was manually set this way .. either mistakenly, or by memory allocation or something like that.
I can't imagine that
Canon would hard program the P mode to set
ISO higher than "as low as possible" or what the user required.
There's no obvious exif entry to indicate if a memory slot was used in camera.
Exif is detailed quite well(bravo PhotoScapeX!!
)
I can see that you used Landscape Picture style, only setting tweak in Landcape is that
sharpening is set to 4, all other parameters are at 0.
it even shows all the Picture Style settings, even tho they werent' used.
I can see that AEB mode chosen was 0,-,+
The very short amount of time I've tried to get my head around [P] mode is that it's nothing like [M] [A/Av] or [S/Tv] modes in the way it affects
aperture and
shutter.
As the term implies, it seems to be a programmed(into the camera) interplay of specific
aperture-
shutter settings.
I've tried to get my head around it by just turning dials, and it makes zero sense what it does in relation to the variables as you turn the dials.
That is, turn a dial one click in either direction and you affect either the 1/2 or 1/3rd
exposure difference in a linear manner for that dial - hardware change.
With Program mode tho, that same single click changes both
shutter and
aperture at the same time.
It's plain to see that there is some hidden programming within the camera as to what it is doing.
I just can't understand it.
Maybe time to RTFM.