I ordered a pair, but there was a black spec on one of the prizms. Anacortes Telescope kindly sent me a replacement pair but this one had a black spec inside one of the eye pieces. Both were sent back to factory. The factory determined that they were within the factory specifications. The third pair they sent me was exceptable. In addition to this pair, I own a pair of 7x50FMTRC-SX. On closer examiation of my 7x50, it also had a black spec on one of the internal glass surfaces. The 7x50 spec is not visible during normal usage. Both specs on the 15x70 would NOT be noticed by an Astronomy user. But if you are near sighted and looking for killer whales on a bright ocean these might not be the best binoculars for the job. Call sign: Porpoise I retired