| 359 / | HD | OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS |
| 362 | DF | COMPOUND LENS SYSTEM {8} |
| 399 | DF | .~ Telescope {12} |
| 407 | DF | .~.~ Binocular {4} |
| 409 | ![]() | .~.~.~ Body supported or with handle {2} |
| 410 | DF | .~.~.~.~> With focusing means |
| 411 | DF | .~.~.~.~> With adjustable interocular distance |