Description
Introducing the Godox KNOWLED GF18M
The Godox KNOWLED GF18M is an 18-inch, or approximately 45.7 cm , motorized Fresnel lens designed for KNOWLED COB projectors equipped with the G mount.
It mounts on all KNOWLED G-Mount COB light sources. Its role is to concentrate the light beam to achieve a more intense projection and sharper shadows than with a wide diffusion. This configuration is suitable for film shoots, commercials, and sets where beam control is more important than ambient lighting.
The Godox KNOWLED GF18M uses Godox’s proprietary G-Mount. It therefore integrates seamlessly into the G-Mount accessory ecosystem without any intermediate modifications. Its design also aims to minimize light leakage, a useful feature when the spotlight is used for backlighting, profile lighting, or directional lighting of a set.
To further refine the beam direction and aperture, it can be used with optional barn doors. These shutters are not integrated into the lens; they are an additional accessory to limit bleed-through onto the frame, background, or out-of-camera areas.
Case studies
- Creating a focused beam on a film set with a KNOWLED G-Mount COB light source.
- Advertising lighting requiring brighter projection and sharper shadows.
- Backlighting or rim light with reduced light leakage around the projector.
- Setting up lighting directed at a setting, a product or a specific area of the frame.
- Use with optional barndoors for better control of beam direction and width.
Frequently Asked Questions:
1. Is the Godox KNOWLED GF18M compatible with all Godox KNOWLED sources?
It is compatible with KNOWLED COB projectors using the G-mount. The advertised compatibility refers to KNOWLED COB G-Mount lights.
2. What difference does this Fresnel lens make compared to a bare COB source?
It concentrates the light output to produce a brighter projection and sharper shadow definition. It is therefore used when the beam needs to be controlled rather than widely diffused.
3. Does the Godox KNOWLED GF18M limit light leakage?
Yes. Its design aims to minimize light leakage, which helps to keep a cleaner beam on a set or in commercial shooting.
4. Can the beam direction be adjusted with accessories?
Yes, by adding optional barn doors. They allow for finer control of the direction and extent of the beam, particularly to avoid spillover outside the useful area.
5. Does the lens use a standard or proprietary frame?
It uses Godox’s proprietary G-Mount , designed for the G-Mount accessory ecosystem of compatible KNOWLED projectors.
Highlights of the Godox KNOWLED GF18M:
- G-Mount compatibility: mounting designed for KNOWLED COB projectors in G-mount.
- 18-inch Fresnel format: approximately 45.7 cm in diameter to concentrate the flow from a compatible COB source.
- More intense projection: the lens concentrates the light output to obtain a brighter beam.
- Better defined shadows: the concentrated beam produces a sharper separation of shadows.
- Expandable control: optional barndoors can be added to adjust beam direction and width.




