You can learn a lot when you are stupid. Of course you can learn a lot when you are smart, and it generally doesn't take as much skin off, but the knowledge gained from ignorance seems to sink in better. Thus my weekend...
Round one. Read the label. Whether you are mixing a cake or setting a camera or purchasing bookcases from IKEA...read the label. Saves you hauling three giant cardboard boxes back up the freeway in a Suzuki Swift to exchange them for one of the right size.
Round two. Hook up a mirrorless camera to the studio lighting system and try to use it in the same way that the DSLR system operates. In my case I have an adapter that lets me use the same lenses as my Nikon. Oh boy, I bet it is going to be better...! Oh boy, am I wrong.
The lenses and the sensors being equal...the images are the same size and proportion. And the depth of field is the same - thats a function of focus distance, focal length, and aperture.
No gain there.
When I am using a camera in studio mode - manual setting for both aperture and shutter speed - DSLR's let me see through the viewfinder at full aperture and then check depth of field by pressing a preview button. Mirrorless cameras don't - they compel me to open and close the aperture by the click-stop ring and I am liable to push the whole assembly out of position as I do it. Do-able, but much more inconvenient.
Moral of the story? Use the regular heavy old DSLR for studio work in manual mode. Save the new you-beaut mirrorless for convenient field shooting.
Round three. The new you-beaut mirrorless camera can be mounted in a wooden box and triggered with a standard cable release. It is absolutely soundless when in the box, but will do perfect automatic focussing and exposure. It will also do a pretty good recording in sepia straight out of the camera. Steampunk Time!