SMALLRIG Rectangular Softbox 60 x 90cm Quick Release Bowens Mount (3930)

If you shoot interviews, product work, or live video, a rectangular softbox can be a proper upgrade over round modifiers. It gives you a wider, more directional light shape that’s easier to place where you want it.

This SMALLRIG rectangular softbox (60 x 90cm) is built around a quick-release Bowens-mount style connection and comes bundled with a fabric grid and diffusers, so you can tweak beam control without immediately buying extras. It’s not “magic” though: for the most flattering results you’ll still want to dial in placement, distance, and whether you’re using the diffusion layers.

The essentials

This softbox uses a quick-release chuck structure designed to let you install it in seconds with one press. On the light quality side, it’s built to keep the inner surface smooth and flat, aiming for a brighter, softer output while reducing issues that can come from rib placement inside the box.

The modifier includes four ribs that create a fuller, deeper luminous surface effect. That matters in practice: with rectangular shapes, small differences in how evenly the fabric opens can affect how consistent the highlights look across a subject’s face or a tabletop.

It’s also designed with a universal Bowens-mount approach, so it’s intended to work not only with certain SMALLRIG RC series lights mentioned by the brand, but also with other Bowens-mount lights available on the market.

Key features

A big part of why you’d choose this is the mix of control and convenience. You get:

• Beam grid included, which helps you manage light direction when you need a more controlled beam.
• Two diffusions included, letting you adjust how soft and spread-out the light feels for different scenes.
• Soft fabric plus a highly reflective coating, aiming for a more uniform soft light effect.

There’s also a durability angle: the ribs are made from high-strength, high-temperature resistant materials, and the design is described as able to withstand tens of thousands of presses without deformation. No one buys a softbox expecting to press it that often, but if you mount and dismount frequently for location work, that “everyday handling” resilience is the kind of thing that can pay off.

What you’ll notice day to day

In use, the rectangular shape is where the difference becomes obvious. For portraits or character interviews, you can align the long side horizontally to create a flattering, wider key light shape. For still life, the beam grid plus a selected diffusion layer can help you avoid unwanted spill onto the background.

A practical example: imagine you’re lighting a product on a desk for live video. You attach the softbox to a Bowens-mount COB light, then use the beam grid to keep the light footprint mostly on the subject area. If you want a gentler look, you add one of the supplied diffusion layers to smooth out contrast. It’s a straightforward workflow rather than a complicated rig.

That said, rectangular softboxes can be a little less forgiving than simple “floodlight” setups if your spacing is off. If you’re short on room or you need very broad coverage, you may find the beam shape needs more thoughtful positioning.

Tech specs

• Name: SMALLRIG Rectangular Softbox 60 x 90cm Quick Release Soft Box
• Type: Rectangular softbox
• Size: 60 x 90cm (23.6" x 35.4")
• Mount compatibility: Universal Bowens mount design
• Included in the box: 1 x softbox, 1 x fabric grid, 2 x diffusions, 1 x carrying bag, 1 x user manual

Who it suits (and where it may fall short)

It makes sense if you’re building a small studio or content setup around Bowens-mount COB lights and you want a rectangular modifier that offers both softness and direction. It also suits creators who actually use their lights often enough to value quick assembly.

It might not be the best match if you only occasionally need soft, undirected light. In that case, a simpler modifier could be easier. And if you’re planning to shoot in tight spaces, the rectangular form factor can take some room to position properly.

Worth considering if you already have a Bowens-mount light and want a modifier that includes control tools (grid) and multiple diffusion options, rather than starting from scratch.

What matters most before you buy

Before committing, double-check that your light’s mount is truly compatible with the Bowens-style connection you’re using. The description frames it as universally Bowens mount, but compatibility ultimately depends on the light head you own.

Also, think about how you plan to light: if you regularly do interviews, portraits, product work, or live video, the included grid and diffusions are directly relevant. If your work is mostly wide, ambient scenes, you might not need the added control.

Is it worth it?

This SMALLRIG rectangular softbox looks like a practical buy if you want a Bowens-mount compatible modifier with quick-release setup and the extras that people usually end up purchasing separately (grid and diffusion options). The design choices around a smooth inner surface and sturdy ribs suggest it’s built for repeat use, not just one-off shoots.

It may not be worth it if you’re after the simplest possible light shaping, or if your space and working distance make rectangular positioning awkward. If you’re in the middle—doing a mix of interviews, portraits, and product/still work—then it’s the kind of modifier that typically earns its keep because it gives you options every time you set up.

Mini FAQ

Does it come with the diffusion materials?

Yes. The package includes 2 x diffusions, along with a fabric grid.

Is the beam grid included?

It is included in the box, and it’s intended to help control light direction.

Is it compatible with Bowens mount COB lights?

The softbox is described as having a universal Bowens mount design, and it’s stated to be compatible with Bowens-mount lights on the market.

What else is in the package?

You get the softbox, fabric grid, two diffusions, a carrying bag, and a user manual.