Movie Library – Halogen Point Heater, Basic performance Focal length and focus diameter of the Halogen Pont Heater HPH-18 Saturday June 6th, 2015 HEAT-TECH info This video is a demonstration to confirm the focus diameter of the Halogen Point Heater HPH-18. Please check the following site for more information. Related page: Focal length and focus diameter of the Halogen Pont Heater HPH-35 Focal length and focus diameter of the Halogen Pont Heater HPH-60/f30 Focal length and focus diameter of the Halogen Pont Heater HPH-60/f60 Focal length and focus diameter of the Halogen Pont Heater HPH-120/f45 Focal length and focus diameter of the Halogen Pont Heater HPH-160/f40 Focal length and focus diameter of the Halogen Pont Heater HPH-60/f105 2-4.Focal Length and Focal Diameter of Halogen Point Heater 3-4.Focal length and focal width of Halogen Line Heater