Fenix SD11 is designed mainly for underwater photography. “R+” mode is the optimal combination of neutral white light and red light, which is super fit for underwater viewing, photographing and video shooting, since red light is extraordinarily scarce even if you have enough brightness. Featuring neutral white LED and soft wide beam, SD11 is fit for illumination and photography on shore or in water. In addition, 100m waterproof classification makes the flashlight perfect for the demands of deep diving. The magnetic rotating ring offers easy output selection, and safe illumination design warns the user of low battery level. The included flashlight clip and camera mount can be used flexibly and work well with most of the sports cameras and DSLRs.

Size    5.13" x 1.02" x 1.33"

Weight    4.67 oz (excluding batteries)

Battery Type    one 18650 rechargeable Li-ion battery

Product Features

  • Uses Cree XM-L2 U2 neutral white LED and Cree XQE red LED, with a lifespan of 50,000 hours
  • Powered by one 18650 rechargeable Li-ion battery or two CR123A Lithium batteries
  • 138mm Length × 26mm Body diameter × 34mm Head diameter
  • 132.5 grams (excluding battery)
  • Combined output of neutral white and red light -- ideal supplementary lighting for underwater photographing, video shooting.
  • 110° super wide beam angle for even and soft lighting effect
  • Specialized flashlight clip and camera mount for photographing; suitable for most sports and DSLR cameras
  • Magnetic rotating ring for one-handed operation
  • Battery level checking
  • Illumination design for safe diving
  • Dual layer body structure; corrosion resistant
  • Tail cap with big buckle for fast and convenient extraction
  • Digitally regulated output maintains constant brightness
  • Reverse polarity protection to protect from improper battery insertion
  • Made of durable aircraft- grade aluminum
  • Premium type Ⅲ hard-anodized anti-abrasive finish



FAQs about Fenix SD11 Flashlight

     1. What is the product positioning of SD11 and who are its target customers?

    A: Fenix SD11 is designed mainly for underwater photography and video shooting. It is fitted with a Cree XM-L2 U2 neutral white LED and a Cree XQE red LED. Featuring soft wide beam and innovative R+ mode for better color rendering, SD11 is fit for illumination and photography on shore or in water.


    2. What are the key features and benefits of SD11?

    A: 1) Optical design for photographing

      2) Magnetic rotating ring and battery level checking

      3) Submersible to 100 meters

      4) Flashlight clip for photographing


    3. When the battery level of SD11 is detected as critical, how about the remaining battery level?

    A: Take Fenix ARB-L18-3500 (3.6V/3500) as an example. When critical battery level is detected, it indicates the voltage is lower than 3.3V (about 30% power remains). The result varies between battery quality and capacity.


    4. When the safe diving illumination design causes the light to step down in lumens, how about the remaining battery level?

    A: The first step down indicates the battery level is critical, that is to say, when the battery voltage is between 3.2V-3.0V (about 20% power remains), a step down in lumens is activated by the safe diving illumination design, which may slightly vary between batteries and output levels. 


    5. What kind of 18650 battery does SD11 use, flat top or button top?

    A: Both can go. SD11 is compatible with 18650 Li-ion battery with flat top or button top and CR123A battery as well. But the battery level checking function and safe diving illumination design only works on 18650 battery.





  • Evan

    I have been diving and using this torch for underwater photography and I am really satisfied as it id a good value for money and it is simple to attach and use to most of the camera gear