Can the Air be plugged directly into my TV with the HDMI port?
What is the mini jack next to the HDMI port for?
What is the Ethernet port for?
these all for debug
What is Mono Bin in camera settings?
it's useful when you do narrow banding imaging with one color camera, it bins R G G B pixels into a mono one
Is Focus mode the only way to see a real-time image?
you are correct
Does focus use the same exposure settings I set in preview?
no, they are different
Are the image files on the SD card readable on my tablet or PC?
connect ASIAIR to your router with the ethernet port or WiFi and visit \\ASIAIR
then you can copy the images
How does the software use the focal length I entered? If I'm using a .8 reducer on my 480mm refractor, should I enter 380mm?
yes, it's useful for plate solving, you should always enter the actual focal length