Fenix Flashlight Flashlight Diffuser Lens AD401

B&H # FEAD401 MFR # AD401
Fenix Flashlight Flashlight Diffuser Lens AD401


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Product Highlights

  • Diffused Light from Flashlight
  • Fits on Flashlight/Headlamp Head
  • Adjustable Beam--Flood/Focused Light
  • For Flashlight w/ 20-21.5mm Bezel
  • High Quality PC Plastic Material
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Questions? Ask our experts:

This Flashlight Diffuser Lens AD401 from Fenix Flashlight is a very useful accessory for a flashlight or a headlamp with a bezel of 20 to 21.5 mm. This PC plastic cap has a hinged clamshell design that makes it easy to adjust the light beam between a focused beam and a flood beam. The simple structure makes it easy to securely fit this diffuser to a flashlight or headlamp with a bezel of 20-21.5 mm, such as Fenix HP10, LD10, LD20, PD20, PD30, L1D, L2D, L1T, L2T, P2D, and P3D.

Diffused light from flashlight
Fits on flashlight/headlamp head
Adjustable beam--flood/focused light
For flashlight with 20-21.5mm bezel
High quality PC plastic material transmits light without changing its color
Packaging Info
Box Dimensions (LxWxH) 3.5 x 2.75 x 0.15"


by PowerReviews
Fenix FlashlightFlashlight Diffuser Lens AD401

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

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Multi-Use Flashlight Beam

By Western Angler

from Montana

About Me Photo Enthusiast

Verified Buyer


  • Attaches Securely
  • Lightweight


  • Flimsy

Best Uses

  • General Use
  • Indoors
  • Night Time

Comments about Fenix Flashlight Flashlight Diffuser Lens AD401:

It works pretty well, I think you lose a few too many lumens and it produces some artifacts in the beam, but it does diffuse the hotspot pretty well. I'm using it on a Foursevens Quark and it fits perfectly.

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