Godox V860ll I bought it for the Nikon D850, it's fine, for the Z50 I don't know, look for information on the internet For a replacement charger look on Amazon

ja

Yes

ISO100, reflector at 200mm

Compatibility: Nikon for TTL measurements

The D5600 is not on the compatibility list I am afraid. D5000, D5100 and D5200 are. I use it with the D810 though. The delivery date is depending on stock. If it is out of stock you have to ask Digitec directly. I had mine delivered the other day because it was on stock.

Have it on a D850 works perfectly and is also not on the list should work the same for you with d750 too

According to the compatibility list, D750 is not compatible. I use it as a master flash for the D7000 as well as the D810, although the latter is not explicitly stated either (only the D800). Works fine though and the battery lasts and lasts. However, it seems as if other tolerances were used for the flash hot shoe on the D750, so that many flash units cannot be attached precisely, i.e. no clean contact can be made with the pins. Therefore, it is probably not advisable....

Yes you can! I use the Godox as master and the Nikon SB-flash as the slave. Runs smoothly. I didn't try the other way around but should not be an issue either. Have fun with your devices :-)

Absolument.

Unfortunately, the manufacturer only specifies the following models as compatible: Nikon D4, D3x, D3s, D3, D2x, D800E, D800, D700, D600, D300s, D300, D200, D7000, D7100, D7200, D90, D80, D5200, D5100, D5000, D3100, D3000, D60, D40, D40x

The flash is compatible with the following Nikon cameras: Nikon D4, D3x, D3s, D3, D2x, D800E, D800, D700, D600, D300s, D300, D200, D7000, D7100, D7200, D90, D80, D5200, D5100, D5000, D3100, D3000, D60, D40, D40x.