Owing to some less-than-competent control in the manufacturing process, a number of Sakura binoculars have incorrect data printed on them. The ones I am aware of (there may be others) are: The 10x-70x70 is a 10-70x50 (as people on here suggested). The 20x50 is a 10x50. The 10x90x80 is a 10-90x60 The 30x60 is a 15x22 The 20x-180x100 is a 20-180x70