I posted this as a reply in another thread but I'll post it here as well. I'm sure this will continue to be debated -- but I've solved it to my satisfaction and decided the 7-14mm will usually be on my G5 body and not my E-M5. Image samples follow below. Here are the comparison shots I did last night. A few observations: I made these shots from more or less the same spot, at more or less the same angle but they aren't exact as I was working hand held and took the images at different times. I more or less matched the image color and so forth but I did minimal processing. I did this in several places in the mill and got the same result every time. The problem will only occur with bright light sources quite a few stops above the average scene level -- like the sun or in this case the very bright overhead lights. Although bright, the space is big and the overall scene light level is low. Perfect to reproduce this. You can readily see that the reflections are of the light pattern on the roof. There are multiple ones from different distances or the "ping ponging" of the light in the lens that results in different blobs but in the same patterns. Clearly, these are typical sensor/lens reflections. The 7-14mm has no filter on it so we can't blame that. Not only are the G5's reflections neutral in color, they are also much dimmer indicating a lesser reflection. The E-M5's sensor somehow reflects a narrower color band, but reflects a LOT of it. The 7-14mm optics sit closer to the sensor than any other lens I own. I wish I'd checked the Olympus 9-18mm before I sold it. I had this problem for sure with it, but less than I do with the 7-14mmm. So, I'll repeat that I think this problem is the "perfect storm" of lens and sensor design interacting poorly. Here's the images, first the full size and the image with the E-M5 is first, the G5 second and the difference is quite dramatic. Now here's 100% crops from the images in the critical areas. This problem is real, but requires certain conditions to excite. However, this is a very common condition in the urbex I do in poorly lit buildings with windows and holes in the wall leading to bright daylight. I will be doing my urbex shooting with the 7-14mm on the Panasonic G5 body and I'm perfectly comfortable with that. I would not recommend the 7-14mm for anyone with an E-M5, E-PM2, or E-PL5 who does shooting in these conditions therefore.