I'm a pilot and travel a lot.
I like taking lots of sunrise and sunset photos, and landscapes. I like the stars to show during both.
WANT a camera with great low light ability BUT HAS TO BE easy to pack (small is good). Also budget under $1000.
AND I want to dabble into some AP on occasion, not foreseeing it to become an obsession (I HOPE).
SO, the A7II (not A7r or A7s just plain A7 II) has a full size sensor with the same megapixels, to my guess that means larger pixels that take in more light-even though ISO has a lower high rating. But takes up more room in a crowded bag.
BUT, the A6400 is much smaller, has higher ISO settings, but a smaller APS-C chip.
What to do? Both are basically $900.
Edited by stubeeef, 10 December 2019 - 05:26 PM.