As a long time reader and first time poster, I would like to thank the many who contribute to this forum. My technical knowledge and applied skills have greatly increased since reading this forum.
Now, I am seeking advice on how to deal with a recent problem that I have encountered. I purchased a EF 70-200 f/2.8 IS II three weeks ago. As soon as it arrived, my excitement quickly turned to concern when I noticed something of a blemish on one of the elements (the element just before the front element). I am not certain as to what it is. It could be dust or a scratch, but my untrained eye is unable to tell.
What course of action would you recommend? I have not registered the warranty. I pondered this and decided to hold off in the event that I should send it back and request a different copy.
Any insight is appreciated.