I have to respectfully disagree with this..
the cloudy diffuser does indeed diffuse the light.
I said it doesn't SOFTEN the light. It does diffuse it, in that it scatters it in all directions. Only a portion of the light goes directly toward the subject, the rest is wasted if it doesn't bounce off of anything else.
if the size of the light source, was the only factor, then the sun would be perfect light, since it is so large, but light is better when the sun is diffused thru clouds..
It's the size of the light source in relation to the subject that makes the light hard/soft. The sun in the sky, in relation to a person on Earth, is a tiny speck, which is why it produces really hard shadows. If the person were up in space right up next to the sun (and managed not to burn up), then the sun would be much larger in relation to the person, and product soft light. A light bulb is tiny compared to a person, and, thus, produces hard light on that subject. However, that same light bulb inches above a toy matchbox car is proportionately larger and produces soft light on that subject. If you put a softbox really close to a person it produces really soft light. If you move that softbox across the room the light/shadow becomes harder because it has become smaller in relation to the person. These aren't just my theories, this is scientific fact that the pro photographic community has known and taught for as long as I can remember.
or on a sunny day, scrims are used to diffuse.. the light of the sun..
The scrim then becomes the light source and it's larger than the sun in proportion to the subject. On a cloudy day the entire sky is the light source, not just the sun. In the studio with window light it's recommended that you use a north-facing or south-facing window because the light coming through wouldn't be direct sunlight. Direct sunlight through a clear windows, the sun is still hard point of light. However, if you put a scrim in the window (a trick we used to do), then the entire window becomes a big softbox light source and produces soft light.
the fong is definitely big,however, I've carried mine around the ren
faire entire weekends and never had it pop off..
Yes, it is large. It's larger than the flash head, so it theoretically produces softer light than the flash by itself, but it's not THAT much larger, so its effect in softening the light is negligable. We're not talking about a softbox.
As for the fong thing falling off, the folks did purchase it for the correct flash (sb800). I'm sure it could have been rigged with velcro to stay put, but that shouldn't be necessary. It should fit and stay perfectly on its own or at least come with velcro or whatever to keep it in place. These were professional wedding photographers that were using it. It wouldn't fall off after each shot, but it wouldn't stay up over the course of an entire wedding.