Jessica,
I had two cameras with me. The video was shot with a Sony HXR-NX80 pro cam. 4k
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pro.sony]
The still photos were shot with my Nikon Z7 with a Nikkor 28-300 using Nikon's Z adapter. I have Nikon battery grip pack on the Z7 which holds two batteries. I shot 1003 NIKON RAW 45.7 megapixel files and the first battery was drained but barely started on the second battery.
The video is a bit disjointed as I was trying to shoot with both cameras. One of the advantages of living so close to the narrow gauge is I am able to shoot video only one day and stills only on another day. But since this train was a one of a kind special, I tried to do both.
One thing to consider and this is true no matter if you are shooting NIKON, Canon, SONY, etc. The high end pro cameras produce large files. Each one of my NIKON Z7 files is 90 megabytes. The video and stills that I shot on the train Thursday took 96.7 gigabytes. You are going to need lots of storage space and a fast computer to process the large files. Some of the SONY video files are over 300 megs each.
This photo was 90 megs as a NIKON RAW file and over 120 megs as a Photoshop file.