November 30 - 3:50pm EST   Sigma, best known as a maker of third-party lenses, has at last issued an explanation as to why its long-awaited DP1 camera has yet to go on sale. The compact was first revealed at Photokina 2006, and had actually reached the pre-beta stage by early this summer; testing revealed however that the image pipeline was badly optimized, reducing image quality in favor of speed. As such Sigma decided to completely re-engineer the pipeline, as well as other specifications. The revised camera has just recently entered alpha testing, and as such is still an unknown distance away from release. [full story]