The Porro SP WP series produced by Pentax was launched on the market in 2015 superseding PCF WP devices. In practice it meant the barrel was changed a bit and 7x50 and 16x60 models disappeared from the line-up, leaving instruments with the following parameters: 8x40, 10x50, 12x50 and 20x60.
solid-looking and completely waterproof casing; good colour rendering; BaK-4 glass prisms; negligible distortion; imperceptible brightness loss on the edge of the field of view; excellent blackening and cleanliness inside tubes; sensible antireflection coatings; 30-year warranty period
narrow field of view with mediocre sharpness on edges; a bit truncated exit pupils