I demo's the 12x56 vs meopta 12x50 and kept the meopta for a few reasons. My nose doesnt fit well with the large eye cups on the maven, low light resolution was surprisingly better with meopta, weight and size better with meopta, and the biggest was lack of CA. The mavens had a ton of CA. The mavens were brighter and clearer to me, though, just not enough to beat the meopta.