While the new Panasonic G2 and G10 have been well received, some current Micro 4/3 owners have been left wondering when we'll see a sensor upgrade in these cameras. It has been my impression that the performance of the Panasonic GH1 sensor is a small step up from that of the Panasonic sensor found in the other current Micro 4/3 cameras. This impression is consistent with the results of DxOmark testing. According to Panasonic, the reason for not using this sensor in other Micro 4/3 cameras is that it costs more (source). The one drawback I and others have found with the GH1 image quality is a susceptibility to banding, a problem which can be addressed using the debanding feature of Nik Dfine. Some have found that later production GH1 sensors are less susceptible. Most likely, we'll see a GH1 replacement at Photokina (September 21-26, 2010) or thereabouts, and I'm hopeful that we will see a new sensor from Panasonic at that time. In the meanwhile, I wanted to share a couple high ISO GH1 images taken yesterday. Each of these images was taken at the ISO 1600 setting, which according to DxOmark is actually ISO 2154. Both images were pushed 1 stop (Exposure set to +1.00) during RAW processing in Lightroom 3, bringing them to the equivalent of ISO 4308. Many review sites test high ISO performance in good light with fast shutter speeds, and that will give a rosy impression of sensor characteristics. These were each 1/25s (handheld, 45mm f/2.8) exposures in a dark room lit by a single halogen bulb. Images were processed from RAW in LR 3 (default settings for NR and sharpening) and then debanded with additional chroma NR only in Nik Dfine. Full-res JPEG: https://farm5.static.flickr.com/4114/4804871411_fd09b88d3b_o.jpg RAW file for download: Full-res JPEG: https://farm5.static.flickr.com/4101/4805497082_7fe1810179_o.jpg RAW file for download: For my purposes, this is more than acceptable image quality for ISO 4000+ equivalent images. If the GH2 can improve on this performance, it may be worth the wait.