I was testing my Oly 17/1.8 recently on a sunrise hot air balloon ride and bunch of pics showed a blue comet like flare (see pic). When I cover the side of lens with hand, the flare disappeared. However, I also noticed a small pinhole size mark near the center of the lens. I was wondering if this 'flare' could be result of side light reflecting/bouncing through this tiny scratch/mark or a flare would happen regardless for primes at wide open? Has any one else had similar experience with the O17/1.8? Thanks!