A manual focus ring and zoom lever for fast operation and minimum drain on battery.

It featured an unusual "focus by wire" system where the focus ring drove the motor when focusing in manual mode.

Some manual focus rings are easier to adjust than others, so it's well worth your time to try them out at an electronics or computer hardware store.

One feature in particular that makes the TRV900 an exceptional camcorder is its focus ring.

Auto-focus and a "Macro" autofocus modes are available, or a fluid-damped focus ring can be used.

As it was going down, the XO read the range off the scope's focus ring.

The focus ring is similarly constructed with more closely spaced ridges and a 100 degrees of turning action.

Another clue to the effectiveness of the AT4 is the presence of a "focus ring" to concentrate the blast.

You even get a manual focus ring on the lens barrel, which comes in very handy.

The focus preset ring is used for recalling the memory save point.