Which wide angle

BarnET wrote:

WilbaW wrote:

BarnET wrote:

You could use a diffuser but good luck lighting anything further then 6 feet away with that at f6.3 where this lens is decent.

A quick test with an 8mm lens on a 60D @ ISO 100 shows the 430 straight-ahead with the wide panel deployed gives wide enough and bright enough illumination to shoot a scene at 2.5m with f/11. That indicates a guide number like 27m, so at 6ft (1.8m) you could use f/14, or at f/6.3 you would need less than 1/4 flash power.

And diffuser significantly reduces your flash range.

Of course, if you spread out light it gets less intense. For instance, the wide panel on the 430EX II increases coverage from a (claimed) 24mm AOV to a 14mm AOV, at the cost of something like 4/3 steps of intensity. That still gives you 4.8m of subject distance at ISO 100 and f/5.6, based on the above estimate of the effective guide number.

And you can't illuminate the entire scene without one unless your bouncinb

Yep, you can illuminate a scene within range either way. I'm quite surprised how deep that range is, and that's just at ISO 100...

Not only can you use flash with an ultrawide lens, but the flash he already has is perfectly powerful enough and capable of both direct and bounce illumination for the lens he's thinking of.

In a very very small room.

You must live in a very very big place if a 4.8m wide room is very very small.

I can't use it inside large interiors with great success. Which are the most subjects with my 8mm and 11-16.

Since other people don't have it, I wonder if your problem might be with something other than the capability of a flash like the 430EX II to illuminate an ultrawide angle. High dark ceilings?