Has anyone experienced this purple bar issue? This is not the uniform banding seen on the E-M5. I was doing some night sky test shots with the E-M1 with the 25mm f1.8 and noticed a very distinct purple bar along the top edge of the exposure. I did some experimenting and found that it seems to appear between 1" and 0.5" shutter speed and between ISO 640 to 1600, all at f1.8. I didn't do a comprehensive aperture bracket but still noticed it up to f2.2. While the exposure indicator was not flashing I suppose this range could be considered under exposed for a night sky with average light pollution. I also tested with the 45mm f1.8 and got the same results so the rules out a lens issue. At ISO 2000 and above, for the same speed and apperture, the band disappears. I gong back through my images with the same exposure for the last year I came across another night sky image with the same issue so it's not new. My concern is, could this be a curtain or some mechanical issue? I've attached an image to illustrate the issue. Subscribe to see EXIF info for this image (if available) View attachment 37611 If it's just exposure and others experience this then I can just make sure I don't shoot at this exposure. I have contacted Olympus support but I thought I'd pass it by the community as well.