After a good cleaning of the 200mm lens last night, I snapped some test photos, here they are. I have to blame myself for this one. Taking a good look at either end of this lens, I found basically zero dust on the lenses at either end, great! What I completely forgot about is the damn screw-on dust cover in front of the lens. Doink! The 24/70mm lens doesn’t have one of these, it should though. now let’s take it outdoors for the next round.