... operation 7. Eight diameters of adapter rings for alternative use 49mm,52mm,55mm,58mm,62mm,67mm ... ,72mm, 77mm8. Four colors of flash diffusers for alternative use orange,blue, oyster white, and ... RF-550E fits any model of Sony brand DSLR Guide Number: 15Effective Distance: 5cm-150cmSync Speed: 1 ... lines we can make 200,000 batteries, 50,000 grips, 5,000 solutions and 5,000 flash lights every month.