Focal length and focus diameter of the HPH-12 HEAT-TECH info 3 weeks ago This video is a demonstration to confirm the focus diameter of the Halogen Point Heater HPH-12. Please check the following site for more information. Related page: Focal length and focus diameter of the Halogen Pont Heater HPH-18 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