The celestron nature dx binocular 10x25 is the perfect companion for the outdoors lover these affordable yet feature packed binoculars are designed specifically for beginners to intermediate users with the nature dx series youll get the important features youre looking for like fully multi coated optics and bak 4 prisms but they are still competitively priced features bak 4 prisms w phase coating increases contrast and resolution for sharper more detailed images fully multi c