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SmallRig RA-F150 Focusing Fresnel Lens for LED Monolights

BH #SM4246 • MFR #4246
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SmallRig RA-F150 Focusing Fresnel Lens for LED Monolights
Key Features
  • For LED Monolights up to 600W
  • 10° Spot to 40° Flood Beam Angle
  • One-Handed Focus Adjustment
  • Bowens S Mount
The RA-F150 Focusing Fresnel Lens for LED Monolights from SmallRig provides a continuous zoom from a 10° spot to a 40° flood with smooth one-handed control. The quick zoom movement saves time and eliminates the possibility of burning your hand. The high-temperature-resistant borosilicate glass fresnel lens optimizes transparency and light transmittance, providing an increase in light intensity up to 13.2x, depending on the light unit used. It is compatible with LED lights up to 600W, thanks to its innovative triple cooling system. The heat dissipation fan allows active cooling, together with the heat sinks at the mounting base and the heat dissipation holes that cool the light and prolong its service life.
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$119.00
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SmallRig 4246 Overview

From Manufacturer

The RA-F150 Focusing Fresnel Lens for LED Monolights from SmallRig provides a continuous zoom from a 10° spot to a 40° flood with smooth one-handed control. The quick zoom movement saves time and eliminates the possibility of burning your hand. The high-temperature-resistant borosilicate glass fresnel lens optimizes transparency and light transmittance, providing an increase in light intensity up to 13.2x, depending on the light unit used. It is compatible with LED lights up to 600W, thanks to its innovative triple cooling system. The heat dissipation fan allows active cooling, together with the heat sinks at the mounting base and the heat dissipation holes that cool the light and prolong its service life.

The RA-F150 features a classic Bowens S mount, making it compatible with many brands and models of LED light. It is compatible with the separately available SmallRig 8-leaf barndoors. It includes a padded storage case.

  • For video and TV production, portrait shooting, and live streaming
  • Heat-resistant borosilicate glass Fresnel lens
  • Standard Bowens S-mount
  • Can be used with the SmallRig 8-leaf barndoors
  • Heat sinks for thermal conductivity; active heat dissipation fan
  • Ergonomic hexagonal design
  • Precision numbered angle output scale
  • Includes a 7.7 x 7.7 x 6.3" padded storage case

SmallRig 4246 Specs

General
Compatibility
All Brands LED Monolights
Physical
Mounting
Back: 1x Bowens S
Color
Black
Material of Construction
Borosilicate Glass, Nylon, Aluminum
Environmental Resistance
No
Dimensions
8.05 x 5.9" / 20.45 x 15 cm (Closed Length)
Weight
3.3 lb / 1.5 kg
5 lb / 2.3 kg (With Case)
Packaging Info
Package Weight
5.085 lb
Box Dimensions (LxWxH)
8.8 x 8.4 x 7.6"

SmallRig 4246 Reviews

Works (kind of) with other lights

By Bruce
Rated 4 out of 5
Date: 2025-01-28

It worked well with my Nanlite FS300 but with a 120W RGB, any extension of the lens resulted in a dark center spot. I think it has to do with the way the COB is arranged with RGB leds.

Good but not so powerful

By Luigi
Rated 3 out of 5
Date: 2024-02-26

I was excited to read how powerful this Fresnel is and bought two, but the real value of the increase light intensity it's only by 1.6x and not 13.2x as advertised. I'm using on the Smallrig 450D which output 17000 Lux with the reflector at 3mt (10' ft) and with this Fresnel at 10° I measure 27000K. Apart this big disappointment, I feel this Fresnel well build (better then the Aputure F10), incredible compact and easy to focus.

See any errors on this page?

Will this work with the Amaran 300C?

Will this work with the Amaran 300C?
Asked by: Aleksandr
Yes, the SmallRig RA-F150 Focusing Fresnel Lens for LED Monolights will mount to the Amaran 300c RGB LED Monolight but it is not specifically optimized for this light.
Answered by: Rachael B
Date published: 2024-12-02

Can this fit on the Ziyun Mollus b500

Can this fit on the Ziyun Mollus b500
Asked by: Jonathan
The SmallRig RA-F150 Focusing Fresnel Lens for LED Monolights can be used with the SmallRig RA-F150 Focusing Fresnel Lens for LED Monolights.
Answered by: Paula M
Date published: 2025-01-21

which barn doors are compatible with this ...

which barn doors are compatible with this fresnel?
Asked by: Alejandro
Small Rig says this works with SmallRig 8-leaf Barndoors (ID: 4204) - SmallRig 8-Leaf Lighting Barn Doors with Bowens Mount Adapter
Answered by: Ian
Date published: 2025-08-14

What power source is used for the active cooling ...

What power source is used for the active cooling fan?
Asked by: Alan
The cooling fan in the SmallRig RA-F150 Focusing Fresnel has no outside power source, instead it uses thermal heat, which is enough to spin the fan. This fan activates once the sensors reach 25°c.
Answered by: Rachael B
Date published: 2025-08-19

How it works with a Molus X100 and its native ...

How it works with a Molus X100 and its native bowens mount adapter?
Asked by: Marcos Eugenio
Yes, you can use the SmallRig RA-F150 Focusing Fresnel Lens for LED Monolights with the Zhiyun MOLUS X100 Bi-Color Pocket COB Monolight (Pro Kit) using the Zhiyun Bowens Mount Adapter for MOLUS X100 (BH #ZHC000590G1).
Answered by: Daniel C
Date published: 2025-11-30

Would this work on a Godox AD600Pro? (the bulb on ...

Would this work on a Godox AD600Pro? (the bulb on the AD600Pro extends beyond the bowens mount)
Asked by: Gregory
The SmallRig RA-F150 Focusing Fresnel Lens for LED Monolights is meant for LED monolights; it would not be a viable accessory for the GODOX AD600 Pro.
Answered by: Davis H
Date published: 2024-12-26

Hi! this works with Godox FV150 and ZSYB 300W ? ...

Hi! this works with Godox FV150 and ZSYB 300W ? The bowen mount it's standard right ? thanks
Asked by: German
The SmallRig RA-F150 Focusing Fresnel Lens for LED Monolights has the Bowens S mount. And yes, it should work with the Godox FV150. The ZSYB 300W is not a light we carry, but it should work with most that are 600W or less and have the Bowens S mount. However, results can vary.
Answered by: Michael S
Date published: 2024-06-27

Is this compatible with the capture 600d?

Is this compatible with the capture 600d?
Asked by: Wes
No, the SmallRig RA-F150 Focusing Fresnel Lens for LED Monolights can physically mount to the Aputure LS 600d but the 600d requires a stronger fan.
Answered by: Rachael B
Date published: 2024-05-01
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