ETalvala, great to know you are working on this issue! Hope you will come to the solution soon 'cause no matter how hard I tried - still no good with correcting this issue in photoshop. I also noticed that when you are aiming a frame with standard camera app the picture also have this blueish vignetting. But when you press the "shoot" button and after the phrase "processing image" the photo displayed on screen have no such an issue - so it's all a matter of post-processing i believe.