The most significant difference between these two models concerns the pixel count of the sensors. The Z7 has a 48.69MP sensor that offers 45.7MP effective output, while the Z6 has a 25.28MP sensor that outputs 24.5MP images. This difference appears to be behind a number of further differences between the two.
84. ISO range
While the Z7 has a native ISO range of 64-25,600, and expansions settings equivalent to ISO 32 and ISO 51,200 on top of this, the Z6 offers a slightly higher starting point of ISO 100 and a top setting of 51,200 in its native range, together with expansions to ISO 50 and ISO 204,800 equivalents.
85. Focusing system
Both cameras have the same phase- and contrast-detect AF system, but they differ in the number of phase-detect AF points. While the Z7 has 493 points in total, the Z6 offers 273, although both cover the same 90% horizontal and vertical stretch of the frame.
86. AF working range
The Z6’s lower-resolution sensor and higher ISO range already makes it slightly more suited to low-light captures, but its AF working range is also more impressive in low light, focusing down to -2EV rather than the -1EV of the Z7.
87. Burst rate
Another key difference between the two, and potentially something that will make a difference for the action photographers, is that the Z6 manages 12fps burst shooting, whereas the Z7 only manages nine. Switch to 14-bit Raw shooting, however, and you’ll find that the difference narrows, with the Z6 and Z7 offering 9fps and 8fps respectively.
88. 6K oversampling
The Z6 can capture oversampled footage using the full width of its sensor, equivalent to around 6K initially before this is downsampled to 4K. This is something the Z7 can only do when set to capture footage using the Super 35mm crop mode.
The lower sensor resolution of the Z6 means that it can’t offer the same 8K time-lapse capabilities as the Z7. Instead, it offers a 4K time-lapse capability.
90. Wi-Fi difference
The Z6 also appears to have a very slightly different wireless system in board. While both models offer Wi-Fi and Bluetooth, the Z6’s radio is rated at 7.4 dBm for 2.4GHz Wi-Fi rather the the Z7’s 7.0 dBm, and 12.2/9.2 dBm against the Z7’s 12.1/9.1 dBm for 5GHz. With Bluetooth, it also packs a 1.9 dBm radio vs the Z7’s 1.5 dBm radio.
91. Battery life
Although both models use the same battery, battery life itself is not the same. While the Z7 can fire up to 330 frames per charge, the Z6 manages a slightly lower 310 frames (both figures according to CIPA specifications).
92. Price difference
The Z6 will considerably cheaper than its Z7 sibling too. In the UK, the camera will arrive with an RRP of £2,099 for its body alone, versus £3,399 for the Z7. Similarly, US body-only prices put the Z6 at $2,000 and the Z7 at $3,400.