Here are some new pancake lens patents from Canon. A total of 4 pancake lenses to be announced. They are Canon EF 45mm f/2.8, Canon EF 40mm f/2.8, Canon EF 35mm f/2.8, Canon EF 28mm f/2.8.
After the Panasonic Lumix 20mm f/1.7 lens was discontinued, the new version of this 20mm f/1.7 II pancake lens now leaked on the web, and it will be announced soon.
Sony has announced the 20mm f/2.8 Alpha E-mount Pancake lens. This is a moderately wide-angle pancake prime lens for its NEX cameras. The moderately-fast E-mount pancake will offer a 30mm equivalent field of view and adds another compact lens option for NEX shooters. When mounted on any Sony α E-Mount camera, the sharp new SEL20F28 ”pancake” lens creates an exceptionally versatile, portable package ideal for a broad range of everyday shooting opportunities ranging from interiors to landscapes, street photography, casual snapshots and more.