Newsy,
This is a new term to me.
I understand release lag - the time after you full press and have
aready half pressed & prefocused.
I understand focus lag - the time it takes to focus while half
pressing.
Finder lag has something to do with EVF's ??
Yes, finder lag (I guess I am responsible for introducing the term) refers to how far behinbd real life is the image seen in the finder.
Becuase the finder is refreshed cyclicly, it is not a simple thing to define exactly. And in some cameras, it varies with light level, as in lower liught, the camera "adds together" the sensor output from several cycles (usina sort of "moving sum" process) to get a good enought imnage to display in the finder. (and by finder here I mean either the electronic eyepiece finder or the "back panel mnitor"). (The back panel monitor is often called "the LCD", but of course the eyepiece finder is alss usually an LCD, as is often the status display panelas well!)
Here's the reason finder lag affects what I have called "effective shutter release delay". Suppose the photographer wants to fire a shot just as the nose of the winning horse crosses the finish line. Because he sees the horse coming, he can press the shutter release with little human "reaction time", and he can also use an early half-press to dispose of focsuing delay.
Suppose the finder lag is 0.130 sec, and the shutter release time (from half press) is 0.120 sec. Assume the photographer is able in fact presses the shutter release precisely when he sees the horse cross the line. But, because of finder lag, the horse actually had crossed the line 0.130 seconds earlier.
Then the camera takes 0.120 seconds after the button is pressed before the shutter fires. So by the time the shutter fires, it is 0.250 sec since the horse actually crossed the line. This is what I describe as the "effective shutter release delay".
Best regards,
Doug
