The outer barrel is grooved to accept Canon's MR-14 ring flash which can be used as the principal light source for close-ups or as on-axis fill lighting for portraits.
Guiding Light | Electric Light Orchestra | light rail | Edmonton Light Rail Transit | light curve | Light-emitting diode | light novel | Charge of the Light Brigade | William Light | light | incandescent light bulb | Light | Florida Power & Light | Baltimore Light Rail | traffic light | Light Up the Sky | Figures of Light | Durham Light Infantry | Docklands Light Railway | Divine Light Mission | Black Light Burns | Australian Light Horse | Angels of Light | Visionaries: Knights of the Magical Light | Somerset Light Infantry | Princess Patricia's Canadian Light Infantry | Oxfordshire and Buckinghamshire Light Infantry | Metro: Last Light | MAX Light Rail | light-sport aircraft |