Panasonic LUMIX S1II / Sony α7R V (ILCE-7RM5)

61 MP allows heavy cropping and large prints; in return files are big and call for fast cards and a capable computer.

CFexpress Type A clears the buffer faster in 8K and long bursts; SD cards also work.

The 120 fps setting shows moving subjects more smoothly in the finder at the cost of more battery drain.

The screen both flips out to the side and tilts on the horizontal axis; this four-way design helps with vertical shots and gimbal work.

The AI unit uses human body and pose data for subject recognition; Sony says vehicles and insects are now recognised as well as people.

The 8-stop figure applies to a specific lens and test condition; the effect varies with other lenses. Active mode in video adds stabilisation but crops the image.

Exposures longer than 30 seconds need Bulb mode or an external intervalometer.

H.265 (XAVC HS) gives smaller files at the same quality but needs a more powerful computer to edit.

The sensor is shifted by a pixel between frames; frames combined on a computer give higher colour resolution or a bigger image. It needs static subjects and a tripod.

USB PD lets the camera run from a power bank or adapter while shooting; 10 Gbit/s suits file transfer and streaming.