Focal Distance 31mm 35mm format value 47.5mm equivalent (PENTAX APS-C size single-lens reflex camera installation) Open squeezing F1.8 minimum aperture F22 lens configuration 9 groups angle of view (diagonal) 70 ° (PENTAX 35 ml size single-lens reflex camera installation), 49 ° (when PENTAX APS-C SLR camera is installed) mount type kaf The shortest shooting distance 0.3m Maximum shooting magnification 0.16 times Filter diameter 58mm Light amount adjustment method Completely automatic squeezing Number of squeezed feathers 9 cards circular aperture (31mm F1.8-F3.5) Aperture ring Yes Syujin None Lens food Fixed Lens cap O-LW65B (attached) Lens case P70-140 (attached) Maximum diameter x length about 65mm x about 69mm mass (weight) about 341g Use temperature -10-40 ° C Used humidity 85%or less (not condensation) bundled accessories Lens cap O-LW65B, lens mount cap K, lens case P70-140 Others HD coating, SP (Super Protect) coating, body color (black)