When it comes to enhancing the versatility of your Sony Alpha E-Mount Mirrorless Camera Body, this durable and high-quality Lens Mount Adapter for T-Mount (T/T-2) Screw Mount Slr Lens is a game-changer. Not only does it allow you to use a wide range of M42 screw mount lenses, but it also maintains the compact size and portability that mirrorless cameras are renowned for. This adapter, offered by Fotodiox, is a testament to the company's commitment to providing robust support for mirrorless camera platforms. It opens up a world of possibilities, allowing you to mount both modern and vintage lenses. With this adapter, you can achieve infinity focus and manual aperture control, all while enjoying a sturdy build designed for lasting quality. Please note that this is a manual adapter. As such, lens functions that depend on electronic communication with the camera body, such as autofocus, Ae metering, and image stabilization, will be disrupted. 'Focus-By-Wire' lenses, like Canon's Stm or Nikon's Af-p, require power to engage the manual focus rings. Since manual lens mount adapters do not power the lens, these lenses will not be able to focus. To use this adapter, you can set your exposure manually or meter using your camera's Aperture Priority (stop-down) mode. If your lens does not have a manual aperture control ring, the lens aperture will revert to its default position. Depending on the lens, this is either stopped down to its largest f-stop or opened up to its smallest f-stop. In conclusion, this affordable and versatile Lens Mount Adapter for T-Mount (T/T-2) Screw Mount Slr Lens to Sony Alpha E-Mount Mirrorless Camera Body is a valuable addition to any photographer's toolkit, especially those looking to maximize the potential of their Sony Alpha E-Mount Mirrorless Camera Body..