umbrella softbox or softbox for softer light?

Which modifier give softer light? An umbrella softbox of a regular softbox?

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It really depends on the manufacturer, design, materials used, double diffusion, etc. I think the trade offs are more on ease of use, assembly time, catch light, materials, durability, and overall quality.

The light quality regarding softness will be fairly close between then.

I would guess it depends on the sizes as well. If they are the same size, pretty close in softness.

Far too many variables to just make a blanket statement.

SIZE is what mostly accounts for 'soft' light!

What I am trying to figure out is the difference in light softness when shooting through two diffusion panel (soft box) vs reflect and through a diffusion panel (umbrella softbox). Any one?

kenwood33 wrote in post #5773946
What I am trying to figure out is the difference in light softness when shooting through two diffusion panel (soft box) vs reflect and through a diffusion panel (umbrella softbox). Any one?

Both techniques merely are efforts to even out the illumination across the surface of the light modifier, so that there are no 'hot spots'...even illumination, or no visible hot spots in reflections of the modifier which are seen in shiny surfaces of the subject

Wilt wrote in post #5774945
Both techniques merely are efforts to even out the illumination across the surface of the light modifier, so that there are no 'hot spots'...even illumination, or no visible hot spots in reflections of the modifier which are seen in shiny surfaces of the subject

Exactly. If the two have the same overall size, the type of diffusion (reflected/single, double, etc) isn't going to make that much difference. There may be a difference, but it would be hard to see without a side by side comparison. Even then, I don't think it will be significant.

The size, quality of materials, and ease of use will be more important in the long run. You don't want it to fall apart, turn yellow, or be frustrating to setup.