The SmallRig Rotatable Mount Plate Kit is a sturdy yet lightweight accessory for the latest Sony Alpha camera models. It is specifically designed to quickly switch between horizontal and vertical shooting modes without adjusting the lens’s optical axis. The kit has a baseplate, lens ring mounting plate, and an Allen wrench for assembly. Notably, the mounting plate can rotate 90 degrees, enabling a quick change from landscape to portrait by loosening a knob, far quicker than using a standard L-Bracket.
The design features additional securing holes to ensure a snug fit to the camera body and a simple push latch by the battery compartment, allowing full access to the battery door. It’s compatible with Arca-type / Manfrotto RC2 tripods and supports additional peripherals like Handle 2093C through its 1/4-inch and 3/8-inch threaded holes. However, it is incompatible with certain Tamron lenses with a USB-C port and some Sony compact lenses.
Concur with your assessment. I use it on an a7Rv. I’d add that lenses which make a camera front heavy when attached to a tripod with a conventional L-bracket, such as my Sony 2.8/90 Macro and my Tamron zooms (2.8/70-180 and 2.8-5.6/28-200) benefit from the forward position of the Arca shoe, almost like adding a lens collar.
NB: 1. The newest Tamron lenses have a USB-C port which blocks entry of the lens into the Smallrig bracket. 2. Sony teleconverters will not fit through the bracket.