This is an antique 1937 MIT (Massachusetts Institute of Technology) Handbook I managed to get my hands on.
I believe this is very hard to find.
My favorite Digital Camera
This Cybershot DSC-HX90V features 720mm zoom lens (30x optical zoom)
Click here to view photos taken by this camera.
This is my SONY alpha NEX-7 with SIGMA 30mm 1:2.8 DN and ACE OPTICAL 1.5X TELECONVERTER LENS attached.