You seem to have one of the coated ones. The Summar is one of the all time under rated Leica lenses because there are so many bad examples around. Surface scratches/cleaning marks usually won't degrade the image. Flare is the problem w/ the Summars, along w/ internal haze. You have to put a hood on it. Unfortunately the Leica hoods are ugly and expensive. I put a 34mm UV filter on mine, used a 34 to 39 step ring, then screwed in a generic slotted hood from heavystar. Cheap, looks good, and works. I have an uncoated one that I took apart and cleaned up, and yes, my pictures are amazing too. The lens excels w/ Tri-X and HP5. Let's let others talk bad about this lens so we can buy them cheap!