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jackpi wrote:
Mirrorless cameras are WYSIWYG. That is not possible
if the aperture stays open until the moment thee picture
is taken.
That will be true when the WYSIWYG option
is authentic, and if the user has enabled it,
which is not always the case.
Live View WYSIWYG bodies offer up to three
settings, but not every Live View body offers
all three. Some have only two. Those three
settings, in order of authenticity, are:
1. Off [no WYSIWYG]
2. Exposure Simulation ["fake WYSIWYG"]
3. Full Preview [authentic WYSIWYG]
In an overly broad generalization, most Live
View bodies, and also Live View SLR modes,
can be toggled between "1." and "2." above.
"3." is not offered on all Live View cameras,
and where available is usually a momentary
hold button, not a mode or toggle. A reason
for consigning it to momentary hold is that
100% WYSIWYG will preview EVERYTHING,
including "Art" filters, etc etc etc and you'd
be hard pressed to deal with exposure and
focus adjustments with that stuff engaged.
Thaz the "broad strokes" picture. Individual
camera models will offer many variations.
One odd variation is where "WYSIWYG Off"
is still showing REAL DoF preview, even tho
viewing brightness is being artificially held
constant. In such a camera the iris will only
fully open up during focusing.
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