My Shen Hao GG and fresnel are a tad dark, having very difficult time to focus, i need either a dark cloth or a hood to see something, with my Speed/Crown Graphics which they come with that folding hood i can focus easily as they are bright, would like to buy something for me Shen Hao, i bought their folding hood but it didn't attach to my Shen Hao, it helped a bit better than nothing almost same or closer to that dark cloth, but i hate holding it all the time to focus/refocus, i want to fix it on my camera, otherwise, i should buy another GG/fresnel brighter than the original one.