Collapsed the lens is only 6.75 inches/171.5mm long.
It's not quite that compact when you're completely zoomed out.
Rather than using a separate collar, the lens has an integrated tripod mount.
By loosening the thumbscrew on the side you can rotate the mount for use vertically. When you rotate the mount to shoot vertically, the switches remain in the correct position for your fingers.
It has the three essential switches for a telephoto zoom: a focus-limiter switch for 5m to infinity, autofocus/manual focus, and OIS on/off.
The barrel of the lens has large, comfortable rings.
The view from the mount side.
The lens has a nine-blade diaphragm and takes a 72mm filter.