Japanese site DC Watch today published images from a Panasonic presentation of two "large-aperture" Lumix X (Panasonic's new "premium" lens line) zoom lenses which are expected to be introduced in 2012. According to the Google-translated text, the images shown below are "mock-ups" of the lenses. The 12-35mm lens above will have the same angle of view as a 24-70mm lens for 35mm format and a minimum focus distance of 0.24m. The 35-100mm lens above will have the same angle of view as a 70-200mm lens for 35mm format and a minimum focus distance of 0.85m. Both lenses are designated as Power O.I.S. lenses (Panasonic's latest optical image stabilization), and both are expected to be of metal construction. The million dollar question is just how fast (f-stop range) these lenses will be. Zoom lenses covering a similar angle of view in other systems (35mm and APS-C formats) have typically featured a constant f/2.8 relative aperture, while (non-Micro) 4/3 zoom lenses have been as fast as f/2 constant. Based on the size of the concept lenses, constant f/2 does not seem a possibility here, and variable aperture (ie, f/2.8-4) seems likely. Hopefully, a constant f/2.8 will be made possible by the miracle of software-corrected distortion. I know a lot of folks were holding out for the heavily-rumored fast Panasonic 12-50mm lens, but for reasons I previously mentioned, the two 3x zooms announced today make more sense and should be a great addition to our system. Source: DC Watch (Google translated) via 1001 Noisy Cameras [Thanks to all who sent this to me. I was waiting for a proper source to whom to attribute the original story and images before posting it on this site. -Amin] Addendum: I did my best to scale (based on lens mount dimensions) the images of the collapsed new 14-42 and the 12-35 concept lens for a size comparison with the Olympus 14-42, Sony 18-55, Pana 14-45, Pana 14-42, and Samsung 18-55: I'm not sure which impresses me more, how small they were able to make the new 14-42 or how small they are presenting the "fast" 12-35 to be. Again, these are roughly scaled based on the lens mount dimension measured from small images. The real 12-35mm lens may be larger than depicted!