Telephoto Lens For Use With - IR Cameras and Thermometers Fluke Ti450 Fluke Ti450 SF6 Fluke TiX500 Features See More Detail with Your Target Magnified 4x More Than A Standard Lens. Identify A Potential Issue In Your Equipment Even When Your Target is As Tiny and Distant As A Failed Splice On A High Electrical Line or Failing Refractory On A Tall Stack Benefit From Extra Stability for Your 4x Telephoto Lens with Our Patent-Pending Lens Attachment System That Holds The Lens Securely In Place