speedlight softbox size

[clintham]

pretty simple question:
what is the largest softbox you would use on a speedlight? (yn560 in my case)
taking into account that you will only be using one speedlight - no multi adapter things.

 

[Gazamonk]

I use a 60cm with a 430exII but I know you can get 80cm for them as well. Depends on what you are shooting and the finished result you are after to be honest.

 

[clintham]

well i figure if i get a larger softbox and i require something a little smaller, i can always mask it off (or use a shoot thru brolly instead). an 80cm x 120cm is one of the larger ones i have seen. im just not sure if a yn560 would be powerful enough for something that size. my shoot thru brollies are 80cm and a yn560 has plenty of power for those.

 

[Cistron]

I would say the supportable size depends on the conditions of the shoot. How close is the subject to the softbox, how much ambient light is around and---linked to that---how fast can your camera sync.

 

[specialman]

I use a 28" westcott with no issues. I suspect there isn't a totally perfect. even power output from corner to corner, but its not noticeable.