Aputure Octa Dome 120: Softbox Setup Tips

By Red Dot Photo | Published: 2026-10-31

Category: How-to Guides

Learn how to set up the Aputure Octa Dome 120 Bowens mount softbox quickly and avoid common mistakes. This guide covers assembly, grid attachment, and positioning for soft, even light.

Quick Answer

Assemble the Aputure Octa Dome 120 in under 10 minutes by following the rod sequence, attaching the grid before the front diffuser, and mounting it securely on a Bowens fixture.

Why Setup Order Matters

The Octa Dome 120 uses a collapsible rod structure similar to a softbox umbrella. If you insert the rods in the wrong order or force them, you risk bending the frame or tearing the fabric. Also, attaching the grid after the front diffuser is much harder and can cause uneven tension.

Bowens Mount Compatibility

This softbox fits any Bowens mount light, including the Aputure 600d Pro and 600x Pro. Before mounting, ensure the locking ring on your fixture is clean and rotates freely. A dirty or stiff ring can prevent a flush fit and cause light leaks.

Setup Steps for the Aputure Octa Dome 120

Unfold and Insert the Rods: Open the softbox flat on a clean surface. Insert the flexible rods into the corner sleeves one at a time, starting with the rod opposite the speed ring. Push each rod fully into its sleeve until the end clicks into the speed ring. Common mistake: Inserting rods out of order can twist the fabric. Always start with the rod farthest from the ring.
Attach the Grid (Optional but Recommended): Before adding the front diffuser, lay the grid over the open softbox and secure its Velcro tabs around the outer rim. This step is much easier without the diffuser in place. Checkpoint: Ensure the grid is centered and taut. A loose grid can cause uneven light falloff.
Mount the Softbox on the Light: Hold the speed ring against your Bowens mount light, align the three tabs with the slots, and twist clockwise until it locks. Tighten the locking ring by hand—do not overtighten. Common mistake: Mounting without aligning the tabs first can damage the speed ring. If it doesn't lock smoothly, realign and try again.
Attach the Front Diffuser: After the softbox is mounted, stretch the front diffuser over the opening and secure the Velcro along all edges. Smooth out any wrinkles from the center outward. Checkpoint: Wrinkles create hotspots. Pull the diffuser taut, especially near the corners.
Position and Adjust the Light: Angle the softbox toward your subject. For a classic portrait look, place it 45 degrees to the side and slightly above eye level. Use the grid to narrow the beam and reduce spill on the background. Common mistake: Placing the softbox too far away reduces softness. Keep it within 3–5 feet of the subject for optimal diffusion.

Product Facts

Aputure Light Octa Dome 120 Bowens Mount Octagonal Softbox with Grid: The Light OctaDome 120 is a 4 feet (120cm) octagonal softbox that transforms any Bowens mount point source into an ultra-soft, natural round eye light. Its large 120cm diameter produces soft, wrap-around light ideal for portraits and product shots, reducing harsh shadows.
Aputure Light Octa Dome 120 Bowens Mount Octagonal Softbox with Grid