Lighting Lens Nanlite FL-20G 23.6 cm Diameter 798 g

The Nanlite FL-20G Fresnel Lens is a glass fresnel attachment designed for the Nanlite Forza 300 and Forza 500. With a 23.6 cm diameter and an adjustable-length housing, it focuses and shapes the fixture's output to provide controlled beam angles and increased brightness. The unit includes metal barndoors and uses a Bowens S-Type mount for quick modifier changes.

Advantages

The FL-20G provides an adjustable beam from spot to flood (10°–45°) via a rotating barrel, allowing precise control over beam spread. Constructed of glass and heat-tolerant materials, it handles the thermal load of the Forza 500 at full output and is fully compatible with the Forza 300. At a 10° spot setting the Fresnel significantly increases measured illuminance, delivering higher Lux values at 1 meter compared with the bare fixture. Metal barndoors are included for additional spill control and shaping.

Suitable for

• Studio portrait and product photography where controlled beam shaping is required
• Film and video lighting setups needing adjustable spot-to-flood coverage
• Location shoots that require quick-swappable Bowens-style modifiers

Key specifications

• Fresnel lens material: glass
• Diameter: 23.6 cm
• Weight: 798 g
• Adjustable beam angle: 10° (spot) to 45° (flood)
• Compatible fixtures: Nanlite Forza 300 and Forza 500
• Includes metal barndoors
• Mount type: Bowens S-Type quick-change modifier mount

How to use

Attach the FL-20G to a compatible Forza fixture using the Bowens S-Type mount until it locks with the push-and-quarter-turn mechanism. Rotate the Fresnel's extending barrel to dial the beam between spot (10°) and flood (45°) to achieve the desired spread and intensity. Use the included metal barndoors to block or shape spill light. Swap modifiers by releasing the mount with the same push-and-quarter-turn action.

Usage recommendations

Use the FL-20G at reduced distances or with diffusion when softer light is required; maintain adequate ventilation around the fixture when operating at high output to ensure optimal thermal performance.