B+W 502 58mm graduated 25% dark grey filter - Collectcamera
Amazon.com : B + W Clear Protection Filter for Camera Lens – Ultra Slim Titan Mount (T-PRO), 007, HTC, 16 Layers Multi-Resistant and Nano Coating, Photography Filter, 82 mm : Electronics
Amazon.com : B + W UV-Haze Protection Filter for Camera Lens – Ultra Slim Titan Mount (T-PRO), 010, HTC, 16 Layers Multi-Resistant and Nano Coating, Photography Filter, 37 mm : Electronics