There's been a thread about banding in OM-D EM-5 + Panasonic 20 mm, there's a lot of speculation about the cause and inconclusive sample picture. There are also a claim that some user did not get the symptoms, but some did including me. While we wait the official comment from Olympus and perhaps the firmware update will resolve the issue, I post my finding regarding the problem so that new OM-D user will not surprised if the same problem happen to them. 1. The settings : OM-D EM-5 with firmware version 1.1 + Panasonic Lumix 20mm with firmware version 1.1. Other lens and camera for comparison are: Olympus mZD 45mm, Panasonic Lumix 14mm, and Olympus PEN EPL-1 2. The Condition: Object consist of white painted brick wall with small item to help focusing under low light condition indoor lit with fluorescent lamp. The camera is being handheld and IS 1 active. No flash, No AF illumination lamp. Mostly at ISO 6400. The comparison of OM-D + Panasonic 20 mm ISO 2500 and ISO 6400 held vertically. Notice how banding appear in ISO 6400 but not in 2500.