Thumbs Up CSEP-1S is new in 2012 and replaces the earlier Thumbs Up CSEP-1 and CS model 1, which are no longer produced.

Thumbs Up CSEP-1S is the same short length as Thumbs Up EP-1S. The thumb rest has a new ergonomic profile (hence the "EP" designation). The thumb rest is angled at 22 degrees, and this new shape distributes the pressure from your thumb more uniformly. This refinement allows you to hold your camera extremely rigidly, yet with great comfort. 

Thumbs Up CSEP-1S is CNC machined from solid brass billet, and the Cold Shoe is an integral part of the complete assembly and cannot be removed – no screws, no joints and no glue, all ensure strength and longevity, and guarantee that holding your camera for your compositions can be done in a repeatable way every time. A silicon rubber insert that extends across the full width of the back of the THumbs Up CSEP-1S, provides a cushion between the camera body and your Thumbs Up CSEP-1S. This silicone rubber insert also serves to dampen camera vibration between your hand and the camera.

Thumbs Up CSEP-1S can be locked securely into place on your camera – which prevents it from moving when using external viewfinders. This ensures consistent, repeatable framing. The locking mechanism is concealed beneath the leaf spring, and is easily and quickly operated using the small Allen Hex wrench provided.

Thumbs Up CSEP-1S will fit the following Leica M models: M9, M8-2, M8, M8U, M7, M6, M6 TTL, M4, M3 and M2. For Leica M cameras older than M8, a portion of the Silicone Rubber insert is designed to be removed to make room for the flash sync socket found on these older M Leicas.