Canon 5246B002 Instruction Manual

19The flash head can be extended or retracted manually to match the lensfocal length. As the focal length of EF lenses and EF-S lenses differs,extend or retract the flash head while referring to the table below (theflash head position in relationship to the lens focal length).When using an EF-S lens with a focallength of 32mm or longer or an EFlens with a focal length of 50mm orlonger, extend the flash head forgreater flash output and longer flashrange.When the flash head is extended, the<TELE> lamp on the Speedlite lightsor blinks.When the <TELE> lamp blinks, retractthe flash head to its normal position. Ifyou take a picture while the <TELE>lamp is blinking, the periphery of thepicture may appear dark.Switching the Flash CoverageFlash Head Position and Lens Focal LengthFlash Head Position Normal Position Extended PositionLens FocalLengthEF-S Lens 15mm or longer 32mm or longerEF Lens 24mm or longer 50mm or longerNormal positionGuide number 32/105 (ISO 100 in m/ft.)Extended positionFlash head positionGuide number 24/79 (ISO 100 in m/ft.)COPY