JTZ Hot Shoe Flash Light Diffuser for Sony HVL-F42AM 3pcs/lot Flash straight on if without our diffuser causes the light to go forward only and creates a harsh shadow behind the subject The flash with our diffuser installed and tilted at 45 degrees gives a nice soft wrap around of light with a soft shadow behind the subject This fits cleanly over the head of your existing flash, no need for cumbersome attachments, hooks It helps to reduce hard background shadows and eliminates the annoying red eye effect