More news from Sigma; the mirrorless system keeps on growing.

There seems no way to ignore the mirror less system in high quality cameras. The DSLR with it's great specs and abilities appears to be heading, slowly, to obsolescence. The latter are just to heavy and bulky. Great for sports photography but really overkill foe everything else. We have independent manufactures increasing the universe of available lenses and this entry is very welcome. 
Sigma has introduced its 'Digital Neo' interchangeable lenses for Sony NEX and Micro Four Thirds. At first sight these might appear to be the DPx Merrills' lenses sawn-off and re-purposed, but delve a little deeper and they turn out to be entirely different optical designs. The DN lenses are simpler - the 19mm F2.8 EX DN uses 8 elements in 6 groups vs the DP1M's 9 elements in 8 groups, while the 30mm F2.8 EX DN has 7 elements in 5 groups compared to 8 elements in 6 groups. In retrospect this isn't entirely surprising - the DP cameras work with in-lens shutters, while the interchangeable lenses have to accommodate a longer back-focus distance due to the focal-plane shutter. The net result is that the DPx Merrill cameras will be a bit slimmer than NEX or Micro Four Thirds cameras with the corresponding primes mounted.

Here's the 19mm F2.8 EX DN and 30mm F2.8 EX DN side-by-side. Both lenses are pretty compact - less than 2" long - with the 30mm the smaller of the two.	Here's the 19mm with its bowl-shaped bayonet-mount hood. The 30mm doesn't have a hood - according to Sigma it simply isn't needed.

The Sony-mount versions of the Digital Neo have been available for a few weeks, and the Micro Four Thirds versions have just appeared. The 30mm F2.8 is being launched at a very attractive price ($199 / £169 / €199), and it seems reasonable to assume that the 19mm F2.8's cost won't be very different. We think these lenses will be particularly attractive to NEX users, given the system's current paucity of primes, along with the fact that the focal lengths make a bit more sense on APS-C.