Sony RX10 Mk IV Review: Ultimate Fixed Lens Camera! Sony just announced the RX10 Mk IV - marketed as an all-in-one, fixed-lens solution for sports and wildlife photography. Featuring a 315-point phase-detect autofocus system and a built-in ZEISS 24-600mm lens, tag along with Justin to see if the RX10 Mk IV is worth its hefty $1,700 price tag. Order the Sony RX10mkIV on Amazon at http://help.tc/RX104 Get Lightroom Photoshop: http://sdp.io/adobedeal Follow Justin on Twitter @photodestroyer and on