These are definitely cheap binoculars. As with most binoculars, these focus by sliding the eyepieces the eyepieces in and out just slightly. However, on my set, the eyepieces can wiggle around a little bit, which makes it pretty much impossible to get a good focus in both eyes at the same time, even with adjusting the monocular. Also, the left side is just not very clear in general and is always hazy around the outside especially. I wasn't expecting crazy fancy, but being Bushnells, I was rather disappointed. They work...ish, but I'm sure you could find better for cheaper at a thrift store.