Nikon Z6 Mirrorless Camera with Accessories Kit

The Z6 has a BSI-CMOS sensor that's much better for high ISO/low light performance than the Z5's CMOS sensor; the Z6 monitor has 2,100,000-dot resolution vs 1,040,000 for the Z5; and the Z6 can shoot 12fps vs 4.5fps for the Z5.

I just tested it for you on 2 different Z6 cameras. Neither had any shutter malfunctions. I would suggest either upgrading the firmware to the latest if you haven't already or contact Nikon if the issue still persists.

The 3.2" LCD tilting touchscreen on the Nikon Z6 Mirrorless Digital Camera may tilt upward by a bit over 90° and tilts downward by 45°.

That means the buffer memory is full , If you are doing long exposures it takes few seconds for the camera to process the file , with my experience if I do a 10 second exposure I wait around That much time until the camera is ready for the next shot

Yes most Nikon Ai lenses will meter properly with the Nikon Z6 and the FTZ adapter.

No, not off the shelf. However, it works very well as an infrared camera, or a full spectrum camera. I have two Z6s. One is normal, the other was purchases (but can also be sent for conversion) as a full spectrum camera. There are several good companies that will do this conversion in a clean room so that there is no dust from the conversion. The electronic view finder focuses off the sensor directly (not optically), so it is perfect for any sort of IR photography. The exposure is pretty spot on as well, but you might have to tweak the EV a bit.

No SSD or battery included on Atomos Ninja ,12V, 3A AC Power Supply and Dummy Battery are included

Both are refurbished. The warranty is 90 days limited warranty from Nikon for both.