I know very, very little about flash, and don't use it all that often, but I do like my little SB-400 for those times when I find it necessary. I've learned how to bounce the flash when I can, but if that's not possible the direct flash of course makes for a very harsh, ugly picture. From what I've heard, the way to reduce this effect is with gels, is that correct? I know the SB-400 is a pretty low-end flash, and it doesn't have a slot or anything that it looks like the more expensive ones have to slide these things in, but is there another way to add a gel to diffuse the light from my flash? Any recommendations for gels to use with the SB-400? Thanks!