Big news guys! The Chinese company Zhongyi Optical officially announced the “Lens Turbo” adapter. It’s the cheap alternative of the famous Speed Booster. The Zhongyi Optical company isn’t an unknown company for NEX owners. The company is the maker of the [shoplink 14656 ebay]Mitakon 35mm f/0.95 E-mount lens (they are here on eBay)[/shoplink]. On the picture on top you can see the Pentax to NEX adapter.
How did they avoid to get into a legal dispute with Metabones? The optical design differs and the Lens Turbo has a reduction ration of 0.726 (Speed Booster is 0.71). It’s a manual adapter only while some Speed Booster adapters also support full electronic AF and Aperture control. The Lens Turbo price is set at US$239.
Click on the image to see a large size version of their first Pentax-NEX adapter: