The 10-pack of M12 Mount Megapixel 5504-961 6.0mm Lenses from Axis Communications are fixed focal length lenses made specifically for the of Axis P39-R Network Series camera. The optional 6.0mm fixed focus lens is designed specifically for the compact megapixel or lower resolution camera. The 5504-961 has been carefully selected to provide higher images with an alternative field-of-view. This lens provides the P39-R with a wider range of viewing/shooting possibilities.