According to various rumor sites, Pentax will be introducing at least two new mirrorless interchangeable lens systems this summer. One camera which we previously covered is the Pentax NC-1, which supposedly will use a 1/2.3" (very small) sensor. Photo Rumors is now reporting that Pentax will also release a camera called the Pentax Q, featuring a 12MP backlit sensor. It is not clear, from the Photo Rumors posting, whether the Q will be the Pentax APS-C mirrorless camera which has been rumored separately (also by Photo Rumors) or something else. Given that there are currently no backlit APS-C sensors in existence, I am wondering if the Pentax Q and NC1 are one and the same, while the APS-C offering (said to be "based on the K bayonet") is something else entirely. There are many interesting format moves which seem to be in progress: Pentax recently entered medium format digital, remains active in APS-C DSLR development, and is rumored to be introducing two separate mirrorless systems Sony has a mirrorless APS-C system, is doubling down on SLT cameras, and is rumored to be exiting the 35mm format DSLR space Panasonic has clearly deserted regular 4/3 to focus on Micro 4/3 (both still and video) Olympus' dedication to regular 4/3 is unclear while they are clearly investing in Micro 4/3 Samsung has gotten more serious about small sensor cameras (eg TL500/EX1), is going "all in" with APS-C mirrorless, and there has been speculation that they may be entering the digital medium format space Fuji now has a compelling APS-C compact, but there is no indication of their interest in building a system of similar cameras with/without interchangeable lenses There are some rumors about Nikon considering a move into mirrorless, possibly with a smaller-than-4/3 sensor Nothing known or even rumored about Canon's possible role in the mirrorless ecosystem With commitments in place to digital medium format and also APS-C DSLR, I'd be surprised to see Pentax invest in two separate mirrorless interchangeable lens systems. I don't doubt that they've developed the prototypes, but two separate system announcements this summer? I'll believe it when I see it!