Every half stop is critical when you're mixing flash and daylight. I've
shot outdoor wedding ceremonies that were under a gazebo with a lit
background. I need the higher shutter speed both to open the stop a bit
and keep the shutter speed high enough for can't miss handholding. A
faster flash synch speed is something that should be available at this
price point. DOF is just one small part of the equation.
Paul
Is there any con in using shutter priority and hi-speed synch of your
choice?
I've used it with my K20D and pictures look fine.
HSS doesn't buy you any extra flash output, in fact it reduces it on many
models of flash. (the same energy must be spread over a range of exposures
to build up the frame, so you don't get full power in each "slice").
Basically once you hit max flash output (or the max you want to use for
acceptable recycle times), the only way to increase the flash's contribution
is to reduce ambient, ie faster shutter speed (changing aperture affects
both flash and ambient).
As awesome as the K7 does look, this is the thing I really wanted to see
improved, and what disappoints me most about the specs. Especially as they
took the opporunity to improve the FPS and max shutter, so presumably a new
shutter mechanism, without addressing this basic issue.
Also, I don't see why they don't offer an electronic shutter on <1/180th
exposures, some of the Nikon DSLRs have done this (was it the D70?), and it
allows flash sync at any shutter speed - the mechanical shutter never goes
faster than 1/250th (or whatever) and the quicker exposure is done
electronically. There may be some technical reason not to offer ths, but
one would think if you can do live view (ie, readout during exposure),
surely electronic shutter isn't that different.
- Peter
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