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Porro and Roof Prisms


Porro Prisms

Named for the Italian inventor by the same name, the Porro prism design has objective lenses further apart than the eyepieces. Some compact binoculars utilize a reverse Porro design with eyepieces further apart than the objective lenses. Porro prisms generally offer a rich depth of field, wide field of view, and three-dimensional image.

Roof Prisms

Named for the roof-like appearance of the prisms, roof prism binoculars have the eyepieces and objective lenses positioned in a straight line. Roof prism binoculars are appreciated for their streamlined shape and durability.

 

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