Swarovski ATX/STX 95mm Modular Objective Lens DEMO Optical Performance 95mm objective diameterFluoride-containing apochromatic HD glass elementsSWARODUR and SWAROTOP high-contrast optical coatingsSWAROCLEAN non-stick coating on exposed lens surfacesField flattener lens eliminates geometric optical distortion and preserves edge sharpness Construction Lightweight and rugged magnesium housingSupple yet durable rubber armored exteriorNitrogen-purged interior for waterproof/fogproof performance-13 to 131degF (-25 to 55degC) operating temperatureSubmersible to 13 ft (4 m) Functionality One-handed operation via side-by-side zoom and focus dialsErgonomic and oversized focus wheelTravel-friendly modular objective/eyepiece systemIntegrated tripod collar for convenient mountingDigiscoping compatible with point-and-shoot, mirrorless, and DSLR cameras