This is an area that I am interested in because I have to take some shots for a friend in June in a room with a 30ft ceiling height which may be too high to bounce. I have found it quite difficult on these forums to get advice on diffusers, but here are some of the things that I have found..
1. Using a diffuser is sort of a last resort if you can't bounce the flash. To soften the light you need the largest possible light source, and a ceiling/wall is ideal..
2. There are mixed opinions on the StoFen diffusers. If you are taking flash full on I think that the softening effect with a StoFen is very small. The instructions that come with the diffuser say to use it angled up at 45 degrees, and this is how photojournalists seem to use StoFens on TV. I have used a StoFen reasonably successfully in this way for shooting people outdoors at night..
3. Garry Fong's Lightsperes clearly work much better because they create a larger light source (although still small compared with bouncing). However, many people complain about the cost - I haven't bought one here in the UK because the cost is twice that in the US..
4. The Peter Gregg solution appears to be somewhat similar to the Lightsphere in that it creates a larger light source. However, I haven't found many enthusiasts on these forums. I am thinking of trying out his solution before my shoot in June..
I hope other contributors come on to this thread.Chris R..
Thank you for your reply. You have confirmed what I have found except that one of the members of the Forum, a Professional Photographer highly recommends the Peter Gregg bouncer...
You need to get a Demb Flip-It with the clear diffusion panel (I believe it's called a DFD Pro). I have 2 Lightspheres but Demb blew it away - cheaper, adjustable, and more convenient - I still have my lightspheres if I ever want to try something like a bare bulb though. Outdoors you can use straight fill, dialing it down or use just the reflector part of the Flip-It to soften the light..
I'm not sure the Demb Flash product is much different than the one from Peter Gregg. It would be interesting if someone has used both of these so as to see which one does a better job. They cost about the same...
Cost you $2 to make it and it is very effective Johnnyhttp://tuxbailey.zenfolio.com..