• The LM-CR II is an improved model of the old LM-CR. Knurling processing on the side of the adapter (non-slip) is shaped to fit your fingers, and compared to older models, it has improved grip and hold feeling and easier to handle. The lens lock button has also been improved to allow for a smooth push, allowing you to remove the lens comfortably • Features: Mount conversion, Weight: Approx. 2.1 oz (60 g) • When using, please turn the camera's "Menu" - "Release without lens" to "ON". Depending on the camera model, there may be differences in the setting hierarchy of "Release" without lenses. Please refer to the user manual for each camera and make the setting • ■ When using a sinker-type lens, please do not leave it in the camera while wearing it • ■ Depending on the lens (shape changes due to individual differences, age changes, or damage) may not be able to be used. We ask that you ultimately judge when installing M-mount lenses