How to Attach Grids and Gels to Round Flash Heads
By The Camera Exchange | Published: 2026-10-26
Category: How-to Guides
Learn how to attach grids and gels to round flash heads using twist lock adapters and holders. Step-by-step guide for Westcott and Godox modifiers.
Quick answer
Attach grids and gels to round flash heads using a twist lock adapter like the Godox AK-R25 Square Flash Head Adapter Holder, then snap on the Westcott Grid & Gel Pack. This gives you quick change between light shaping tools without tools.
Why twist lock adapters simplify your workflow
Round flash heads have a circular front that doesn't naturally hold square or rectangular modifiers. A twist lock adapter creates a flat mounting surface and locks the modifier in place with a quarter-turn. This avoids the need for Velcro straps or gaffer tape, which can slip or leave residue.
The Godox AK-R25 is a simple metal bracket that adapts a round flash head to accept square accessories. It's a low-cost solution if you already own square grids or gels. The Westcott Grid & Gel Pack is designed for twist lock systems and includes both a grid and gel holder in one unit, saving you from buying separate pieces.
Trade-off: not all round flash heads are twist lock compatible
Twist lock adapters work only on flash heads that have a twist lock ring built into the front. If your flash head has a Bowens mount or a simple friction fit, the AK-R25 won't attach. Check your flash head's front diameter and locking mechanism before buying an adapter.
For flash heads without a twist lock, you may need a Bowens-to-twist-lock converter or a dedicated gel holder that uses elastic bands. The Westcott Grid & Gel Pack is specifically designed for Westcott FJ series and L60-B lights that have twist lock, so it won't fit generic round heads without the correct adapter.
Step-by-step: attaching grids and gels to round flash heads
- Check your flash head's front diameter and lock ring: Measure the outer diameter of your flash head's front ring. Most twist lock systems require a diameter around 3.5 inches (89 mm). If your light has a twist lock ring, you're ready. If not, you need a compatible adapter or a different modifier system. Common mistake: buying a twist lock modifier for a flash head that has a Bowens mount or no lock ring.
- Attach the Godox AK-R25 adapter to your round flash head: Align the adapter's four tabs with the slots on your flash head's twist lock ring. Press the adapter onto the ring, then twist it clockwise about a quarter turn until it locks into place. You should hear or feel a click. Checkpoint: the adapter should sit flush and not wobble. If it feels loose, remove and re-align before forcing it.
- Snap the Westcott Grid & Gel Pack onto the adapter: Hold the Grid & Gel Pack so its twist lock ring faces the adapter. Align the tabs of the pack with the slots on the adapter. Press firmly and twist clockwise until it locks. The grid or gel holder is now ready to use. Common mistake: twisting too hard or not aligning the tabs fully, which can cross-thread or damage the plastic.
- Insert your grid or gel into the holder: For the grid, simply slide it into the front of the Westcott holder until it clicks. For gels, open the hinged gel holder, place the gel sheet inside, and close it. The gel holder accepts standard 4x4 inch gel sheets. Checkpoint: make sure the gel is flat and not bunched, or it may cast uneven color on your light.
- Test the lock and light output: Turn on your flash head at a low power and fire a test shot. Look for any light leaks around the adapter or modifier. If the modifier feels loose, re-seat it. If light spills from the sides, you may need a foam gasket or a different adapter. Final check: a properly attached modifier should not rotate or fall off when you tilt the light head downward.
Product facts
- Godox AK-R25 Square Flash Head Adapter Holder: The Godox AK-R25 is a square flash head adapter holder with a price guarantee and rent option. It lets you use square modifiers on round flash heads, giving you more light shaping options without buying a new light.
Godox AK-R25 Square Flash Head Adapter Holder - Westcott Grid & Gel Pack for FJ100, FJ80, FJ200, L60-B (Twist Lock): The Westcott Grid & Gel Pack fits FJ100, FJ80, FJ200, and L60-B lights with twist lock, and includes both a grid and a gel holder. You get two essential light modifiers in one package, and the twist lock attachment is fast and secure compared to magnets or tape.
Westcott Grid & Gel Pack for FJ100, FJ80, FJ200, L60-B (Twist Lock)
