Function of adapter ring:
1. After the transfer, you can shoot in M mode without displaying the aperture and without any information in the photo. Please manually set the lens value or adjust the adapter ring accordingly. The camera can change settings such as shutter speed and ISO.
2. Some cameras can use AV、 P、 Automatic mode shooting, automatic exposure, very convenient for shooting. For example, for Canon DSLR, for Sony NEX single lens reflex, etc. Nikon usually requires three digit models to provide this feature.
3. Some camera menus require corresponding settings to press the shutter button, such as AF DSLR, NEX single lens, M4/3 single lens, and so on. When encountering warnings such as "unable to press the shutter button in M mode" or "incorrect lens installation", the camera menu settings should be modified. Generally, in the "Settings" and "Custom" sections, the name is usually called "Release shutter button without lens installation", and the settings can be changed to "Allow".
Specifications：
Material: Aluminum alloy
Applicable lens：for B4 2/3" Mount lens
Applicable camera：for NEX E mount Camera
Color: black
Package include：1 x Mount Adapter Ring
Note：
1.When using the adapter ring for the first time, please turn on the "Release Shutter without Lens" option in the body menu, otherwise the adapter lens will not be recognized.
2. Full frame cameras always have dark corners, and B4 lenses require a 2X zoom to improve the dark corners. APS format cameras with 2X zoom have almost no dark corners, and BMCC cameras also require a 2X zoom. Due to the significant difference in imaging between the lens and the body CCD, most lenses have black borders on this adapter ring. Please choose carefully.
3. Due to the weight of the lens, it is recommended to use the following camera mount, which can connect the camera and tripod. Adding a lens holder can support the lens and provide stability.
4. Due to the special nature of the lens, there are design limitations. When the lens is not in the center position after installation, it may be offset. Some lenses with handles may be affected, while those without handles generally do not affect use.