for problematic exposures such as night photography,I started to try a digital version of the Zone System but after many attempts,I have to admit that the automatic exposure of my Nikon D800 does a much better job.anybody with similar or f]different experiences?
For night exposures with a digital camera I would recommend an "histogram based" and "zebra-stripes based" approach.
My old my always excellent Sony DSC-R1 has an electronic shutter and an "always-on" sensor so it gives me a histogram in real time. That warms up the sensor (one has to be careful to turn the camera off during any dead moment) but works very well to "place" the highlights where you want them to be.
I suppose with a digital camera such as a D800 one has to take the picture, examine the histogram, take another picture.
The histogram will show clipped highlights for non-relevant highlights that we want to let blow in any case, such as stretlamps. In my case, I use "zebra stripes" on the viewfinder to see which part of the image is clipped. The viewfinders shows the parts of the image with clipped highlights and not just the histogram.
The "curve shape" part of the zone system (increasing contrast or flattening contrast) will be dealt with in post-processing with curves on the luminosity level, in my practice.
Some modern external light meters allow the memorization of the real dynamic range of the camera (not the BS which is published in DPReview and similar sites) and they would be useful, or practical, if you want to use "placing" of zones into the dynamic range of the camera. If memory serves, Sekonic makes such light meters and probably others.