Long ago in the sixties I discovered the power of stereo photography by playing with aerial images, which are just cha-cha's hypers (about 3 Km base). Then I tried to shoot the cha-cha's myself, and I could not stop shooting stereos until now.
Stereo alignment was a concern of mine from film times until present digital times:
I have built an NX1000 rig of variable base (I could not live without hypers):
For quick and dirty stereos I pick up my W3
However when I want the best possible quality I resource to a Fujifilm X-M1 in cha-cha, albeit with the limitations of cha-cha.
For viewing nothing like my 4K passive 3DTV. I send the images pre-interlaced using a Raspberry-Pi running Visor3DTV:
Location: Aranjuez, Spain