Removing the anti-aliasing filter for greater definition on the Pentax K-5 IIs hasn’t had a negative impact on its DxOMark Camera Sensor Ratings. It’s an exceptional camera that’s top of its class for semi-pro models and holds its own against many expensive pro models, too. It can’t compete with the latest evolution of Nikon full-frame models, like the D600, D800 & D800E or the Sony A99. Where it does fall down however is in the Sports category with Low-Light ISO ratings that don’t come close to professional sports cameras or the full-frame models of the Nikon D600, D800 or D800E. If it’s a studio or landscape camera you’re after however, you’re happy to shoot at low ISO sensitivities and you can avoid the danger of moiré the Pentax K-5 IIs is phenomenal and sets the bench mark for semi-pro DSLRs in the DxOMark Camera Sensor Ratings.