The diffuser is used to create exposures of even density over the entire surface  of film. Use the diffuser by placing it flush against the front of the lens and  exposing through it. The light that passes through the diffuser and on to the  film will create an even density across the surface of the film. 
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. Try us and see the difference.  It disperses the light over a wider area for a softer, more balanced and natural  effect than you didn't use before. 

It helps to reduce hard background shadows and eliminates the annoying red eye  effect. 

Specifications 
Quantity: SOFT Flash Bounce Diffuser 1 set (Flashgun not include) 

Suitable for:
Canon: 580EX II, 580EX, 550Ex , 540EZ, 430EZ, 420EZ , 430EX, 420EX, 380EX, 520EX  ,300TL 
Nikon: SB24, SB25, SB26, SB28, SB28DX, SB50DX, SB80DX, SB800, SB600 
Minolta: 5600HS, 5600HS(D), 3600HS(D), 3500xi, 5400HS, 5400xi, 5200i 
Sigma: Sigma 500 Series 
Sigma EF-500DG, EF-500DG Super 
Sigma EF-500 DG II, EF-500 Super II 
Contax: TLA 280, TLA 360 
Metz: 40-MZ-2, 44 AF-4, 40 AF-4M, 54 MZ-3 , 44 MZ-2, 54 AF-1C, 54 AF 1N, 44  AF-4C, 44 AF 4N, 54 AF-4i, 54 MZ-4, 40 MZ-3i , 54 MZ 3, 54 MZ 4, 36AF 
Metz: 45 CT-1, 45 CT-3, 45 CT-4, 45 CT-5, 45 CL-1, 45 CL-3, 45 CL-3 
Sony HVL-F32x, HVL-F1000, F36AM, F56AM 
Olympus FL40,FL50, G40, FL36 
Soligor TIF 380, DG-420Z 
Sunpak: 2000DZ, 266D, 355AF, MZ440AF, PZ5000AF 
Vivitar: 2500, 273, 3500, 5200, 550 FD, 728AF, 836, 840AF, 850AF, DF200 
Achiever: 260AF, 260T, 630, 828, 828TW,TZ250 
Cobra: 480AF, Auto280 
Nissin: 360TW, 360TXP, PZ400-c-n-m 
Promaster: FT-1700, FTD5700, FTD6500,FTD7000M 
Pheonix: 80DZA,82ZBDA, D79-BZS, ZB1-92N 
Pentax: 330FTZ, AF500FTZ