This part is awesome. Small, compact, handy, consumes less space in the camera bag or pocket, you can take it anywhere. Has a good effect, the light is really very soft, harsh shadows in portraits no longer occur. The light color changes a little towards red but that's the only good portraits. Like all diffusers swallows it quite a lot of light, but that's normal. It is very easy to install on the flash unit through a kind of rubber ring and the expensive flash unit is not scratched or damaged. Fits various sizes. For me, it fits perfectly on both my Nissin Di622 and on my larger Nikon SB-900th Although it swallows much light I can still expose my SB-900 rooms to 8 m, at ISO 400, what more could you want. ISO 400 are absolutely on my D90 no problem. Ingenious part. PS if you have experienced this review helpful: I am very pleased with each click on the "Yes" button - it's nice when you realize that it is useful to create a review here.