FujiFilm Z800EXR has a
12.0MP 1/2-inch (6.4 x 4.8 mm ) sized CCD sensor and features EXR processor. On the other hand, Fujifilm Z1000EXR has a
16.0MP 1/2-inch (6.4 x 4.8 mm ) sized EXRCMOS sensor .
Below you can see the Z800EXR and Z1000EXR sensor size comparison.
Sensor Size and Resolution Comparison image of FujiFilm Z800EXR and Fujifilm Z1000EXR Cameras
FujiFilm Z800EXR and Fujifilm Z1000EXR have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since FujiFilm Z800EXR has 32% larger pixel area compared to Fujifilm Z1000EXR, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
FujiFilm Z800EXR
or the
Fujifilm Z1000EXR ,
including hyperfocal distance.