Kostas Kavoussanakis mused: > > On Fri, 19 Nov 2004, John Francis wrote: > > > On both cameras (the *ist-D & the *ist-Ds) activating DOF preview will also > > activate the metering circuitry, and indicate what the camera considers to > > be the correct exposure. So the camera will tell you whether it thinks you > > are going to over-expose or under-expose, but it won't change the selected > > shutter speed to "correct" the exposure. To actually change the shutter > > speed to the one the camera thinks is right you have to push the button > > (green button on the *ist-D, AE-L button on the *ist-Ds). > > Does one have to press both in succession, or is the green/AE-L button > enough to meter and adjust? > > Curious, > > Kostas
Just pushing the button does everything. The whole cycle (stop down, meter, set exposure, open up) takes place automatically in a few tenths of a second. You don't ever need to use the DOF preview. But it's nice to have a way to check the exposure without changing the settings, should you so desire.
