Porro prism binoculars are generally harder to water and fog proof and are usually not as durable. Because of their inherent design a roof prism binoculars will cost more than a porro prism with a comparable view. As mentioned phase correction is necessary in a roof to attain the contrast and clarity of a comparable porro, this contributes to increased cost. Although, these distinctions are becoming more blurred with Chinese manufacture of roof prism binoculars for several Japanese companies. There are some phase corrected roof prism binoculars currently available for $200 and under that offer surprisingly good views. Hunters usually prefer the roof prism because of its more compact design and durablility.