On Feb 25, 2006, at 10:16 AM, Aaron Reynolds wrote:
- Using the DoF preview will show you the difference in EV between
the currently set manual exposure and what the meter is seeing.
The DoF Preview button does not set the shutter speed, only the AE-
Lock button (or the thumbwheel...) does that.
Does the DS2 operate differently from this? This is how the DS has
always operated.
When set to aperture priority, tugging the DOF preview sets the
shutter speed as well. When set to manual, it works as you describe.
What I see:
With the DS and firmware rev 2, when set to aperture priority with an
M/K-mount lens, the iris will not close down to the set aperture.
Tugging the DOF preview lever sounds like it's actuating the
mechanism but it isn't (verify by looking in the lens). The shutter
speed will be set as complement to the lens with the iris wide open,
but it floats until the time of actual exposure.
If the DS2 actually operates the iris mechanism in Av mode with these
lenses, that is indeed different behavior, a worthwhile change. I'd
suggest looking in the lens and checking.
Godfrey
