On Jan 1, 2009, at 4:44 AM, Anthony Farr wrote:
Until the light levels get very low, it completely compensates for
the
stopped down iris. At the limits it gets noisy and eventually gives
up
the ghost, but conditions like that would have an optical viewfinder
too dark to see long before.
I had a short hands-on viewing of a G1 a couple of days ago and was
quite
impressed. Under the flouro lighting of the store interior I found
that the
finder had a slight soft strobing effect. We have 50Hz power here,
and I
notice that its EVF has a 60 fps refresh rate, which coincidentally
(or
not)matches the 60Hz that most countries supply their electricity at,
regardless of the voltage.
Most of the stores have long, parallel flourescent 60hz fixtures here
which can cause the same soft strobing effect, occasionally. I don't
see it at all around my apartment, however, which is lit entirely with
the coiled flourescent bulb replacements. Except in the kitchen where
if I run a sequence of exposures with my K10D at 1/125th sec or faster
I can see color and density shifts frame by frame caused by the
overhead parallel flourescent lighting of similar type.
It probably has more to do with the specific lighting sources than
anything else. It's certainly not more than a minor and occasional
annoyance. :-)
Godfrey's comments about the G1's suitability for candid portraiture,
especially restless children, will be interesting.
I have done a little bit of people work with the G1 so far, and find
it a superb performer. But most of my shooting in this vein has been
with adapted manual lenses (the Pentax M50/1.4 and Nikkor 20/3.5) so
if you're looking for AF performance and responsiveness, I can't say
too much there yet.
However, I will say that the AF system is astonishingly accurate on
portraiture with both the Summilux-D 25mm f/1.4 and the standard 14-45
lenses, wide open. Set the AF to 'face detect' mode and it identifies
and tracks faces in the field of view with uncanny accuracy and nails
the eye as critical focus point. For a portrait shooter, set the
camera on a tripod, hook up the remote release, frame the subject and
shoot away ... the hit rate will be better than 95% perfect!
Godfrey
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