What kind of softbox (preferably Octabox) goes with this? Something portable that can be set up quickly outside. I have ordered Bowens S2 so I need something that works well with these two.
Supplement to the first answer. Basically, all light shapers with a Bowens connection fit the S2 adapter. With the Godox light shapers, you have to be careful not to get one with the smaller Godox connection, which looks almost the same. Unfortunately, this is not clearly described in the product descriptions.
The cheap Octaboxes are almost all those that cannot be opened and closed quickly. They have to be put together laboriously. Completely unusable on location. Many of the more usable ones are not available.
I can only really refer to SMDV Speedboxes (google). They are first class and can be opened and closed quickly. They are the best light shapers I have seen so far. Pay attention to the Bowens connection there too. By the way, they are made in Korea.
The range in this area in this shop here leaves me a little perplexed. It's a jumble of suboptimal products from dozens of manufacturers. Even well-known manufacturers like Elinchrom, Profoto or even Broncolor buy the light shapers cheaply in China (presumably from Jinbei), stick their name on them and triple the price.