I am trying to figure out what bounce is the best to use. Anyone
with experience of using these systems please post your experience.
Please tell if you have any annoyances with the bounce your using
also. Anyone using 2 or more bounce types please tell of your likes
and dislikes as well.
Okay, they're not
completely useless. Just mostly useless.
These items are good for exactly one thing: increasing the angle of light projected from your flash unit. This can be extremely useful for flash photography from your 10mm lens.
Other than that, they're worthless.
You see, the softness of light projected on any subject is simply a matter of the size of the light source in relation to the size of your subject.
For instance, the sun is an extremely large light source. I'd even hazard to guess that Gary Fong doesn't offer a diffuser half the size of the sun. But direct sunlight is extremely harsh. Definitely not soft.
Why? Well, the sun's a very long way away. So relative to the subject being photographed, it's a tiny light source.
The same thing happens with these devices. Put one on your flash, which is on your camera, and it's as far away from your subject as your camera is. At typical portrait distances, that's over ten feet.
Now let's say you have an unusually large on-camera flash diffuser. How 'bout five by seven inches? Move it ten feet away and it's a very small light source. Can you imagine a portrait photographer with a 'soft box' that was only 5x7 inches? Heck, the flash tube in my Powerlight 1250 is nearly that big by itself.
But, you protest, you wanted to use it along with bouncing the flash off the ceiling. These items will help project some of the light forward when your flash is tilted upward. But so will an index card taped to your flash head. Keep in mind that bouncing can be a troublesome technique to pull off. Low white ceilings with no obstructions can be hard to come by.
If you want something that will truly soften your image, you need something big, like an umbrella. Umbrellas are measured in feet, not inches. A typical small one might be 36" (three feet) in diameter. Do you want that mounted to your camera? Of course not. At that point, you're talking about having stand-mounted flashes.
The sample photos that people post showing how well these items supposedly work are actually just examples of good fill-flash technique. And for that, you don't need to mount any platic gizmos to your flash at all.