How Much Electronic Viewfinder (EVF) Lag Is There In A Nikon Z7II?

This was my simple test setup.  It seemed to provide me with the 
answers I sought. In this example, the iPhone's stopwatch function shows
43.12 seconds while the image of it in the Z7II's LCD shows 43.10 second.
In this particular exposure, the lag was 0.02 seconds or 20 milliseconds.
(click to enlarge)

In my last post I reported the results from some quick and unscientific lag time tests I conducted on the four EVF/LCD 'use case' modes provided by Fujifilm in the X-H2S camera body.  The tests showed the average lag time between the present and how much time passes before your EVF/LCD catches up.  You can find that post here if you are interested.

That said, I set up the same rudimentary test to determine how much EVF/LCD lag there is in my Nikon Z7II.  Very simply, I set my iPhone on a stand and put the Z7II on a tabletop tripod in front of it.  With another camera I then made five exposures showing the difference in time between what time is showing on the iPhone's screen and what time is showing on the camera's LCD.  I then averaged the results.  See the image at the top of this post for an example.

I found my Nikon Z7II showed an average time lag of 0.029 seconds or 29 milliseconds.  I am perfectly happy with that.  That certainly is faster than my reaction time.

Take this little test for what you think it is worth.  In my testing there is a possibility I may have missed something important that invalidates the results.  If so, let me know.  I am always trying to better understand the tools I use and understanding the amount of time between what happens before me and when I actually see it in the viewfinder.  That can be important if I'm trying to track and photograph a fast moving subject.

Join me over at my website, https://www.dennismook.com.  

Thanks for looking. Enjoy!  

Dennis A. Mook  

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