Fenix SD11 Diving Flashlight

Rated 5.00 out of 5 based on 1 customer rating
(1 customer review)

Fenix  SD11 diving light is specifically designed for underwater photography and video shooting. The advanced “R+” mode is made for better color rendering with of a combination of neutral white LED light and red LED light. R+ mode makes the SD11 an effective light for underwater viewing, photographing, video shooting and even photography on the shore since red light is extraordinarily scarce. Featuring a soft wide beam and R+, SD11 is fit for both illumination and photography on shore or in water.

In addition, the 100m waterproof classification, maximum 1000 lumens and low battery warning makes the SD11 perfect for the demands of safe deep diving photography. Easily choose output selection with the magnetic rotating ring while you are diving. The included flashlight clip and camera mount are compatible with most of the sports cameras and DSLRs.

$125.00 $94.95

5.00 out of 5
SKU: SD11L2BK. Categories: , , .
WARNING. Be aware of counterfeit Fenix merchandise in the U.S. marketplace. Click here for more details.
For commercial orders and group purchases, contact us at (888) 775-9996 x2, or

Max Lumens: 1000
Modes: 3

Flashlight Size:
Length: 5.43” (138mm)
Diameter: 1.02” (26mm)
Head: 1.34” (34mm)

Flashlight Weight: 4.67 oz. (132.5g) excluding batteries

Batteries: One 18650 rechargeable Li-ion batteries or two CR123A Lithium batteries

Included: Flashlight clip & camera mount, diving lanyard, two spare O-rings, brand ring

Warranty: Limited Lifetime Guarantee from Fenix Lighting US

MODE Lumens
Impact Resistance
High 1000 2h 148ft. (45m) 505cd
Low 500 3h 40min 98ft. (30m) 225cd
R+ 250 3h 75ft. (23m) 132cd
1m IP68, underwater to 100m
Additional Features
  • Uses Cree XM-L2 U2 neutral white LED and Cree XQE red LED, with a lifespan of 50,000 hours
  • Combined output of neutral white and red light — ideal supplementary lighting for underwater photographing and 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
  • Low battery level warning
  • 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

Operation Instruction
Rotate the magnetic ring to turn on/off the light, to select the wanted output level, and to check the battery level. From left to right: Battery level, R+, Off, White low, White high.

Battery Level Indication

Rotate the magnetic ring to the battery icon. There are three statuses:

Red light constantly on: Sufficient

Red light slow flash: Low

Red light quick flash: Critical, replace the battery soon as possible

** Safe Diving Illumination Design

  1. If the detected voltage is lower than the preset voltage when used on High output or Low output, the output will automatically step down to prolong the runtime.
  2. If the detected voltage is lower than the preset voltage when used on the combination light mode, the red light will go out and the white light will automatically step down, thus to remind of battery replacement as soon as possible.

Intelligent Overheat Protection
The light will accumulate a lot of heat when used at High output level for extended periods. If the light reaches a temperature of 65℃ or above, it will automatically step down by a few lumens until 700 lumens output is reached. When the temperature is reduced, the output will gradually return to High output level.

Battery Replacement
Unscrew the tail cap to insert the battery with the anode side (+) towards the light head, then screw the tail cap back on.

Accessories Assembling

With the sports camera

  1. Mount the flashlight to the flashlight clip, tighten and close the locker (available flashlight diameter ranges 23-26mm).
  2. Connect the 3 ridges pivot arm of the flashlight holder and the 2 ridges pivot arm of the waterproof cover of the sports camera; tighten the long thumb screw.
  3. Connect the 2 ridges pivot arm of holder and other accessories or the handheld floating bar; tighten the short thumb screw.

With the camera hot shoe adapter

  1. Mount the flashlight to the flashlight clip, tighten and close the locker (available flashlight diameter ranges 23-26mm).
  2. Connect the 2 ridges pivot arm of the flashlight holder and the 3 ridges pivot arm of the camera mount, tighten the short thumb screw.
  3. Connect the camera mount and the hot shoe of the camera, tighten the hand gear.
  4. The bottom port can be connected with the tripod via a cradle.

Usage and Maintenance

  • Disassembling the sealed head can cause damage to the light and will void the warranty.
  • Fenix recommends using excellent quality battery.
  • If the light will not be used for an extended period, remove the battery, or the light could be damaged by electrolyte leakage or battery explosion.
  • Long-term use can result in O-ring wear. To maintain a proper watertight seal, replace the ring with an approved spare.
  • Periodic cleaning of the battery contacts improves the lamp’s performance as dirty contacts may cause the lamp to flicker, shine intermittently or even fail to illuminate for the following reasons:

A: The battery needs replacing.
Solution: Replace battery (Ensure battery is inserted according to the manufacturer’s specifications).

B: The threads, PCB board contact or other contacts are dirty.
Solution: Clean the contact points with a cotton swab soaked in rubbing alcohol.

If the above methods don’t work, please refer to the warranty policy before contacting your authorized distributor.

The flashlight is a high-intensity lighting device capable of causing eye damage to the user or others. Avoid shining the flashlight directly into anyone’s eyes.

Customer Photos

SD11 in Hawaii

Highest Setting

Red Light Mode

Opihi & Prawn

Reviews (1)

1 review for Fenix SD11 Diving Flashlight

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  1. Rated 5 out of 5


    This was a lot more than i was expecting from a device of this price!
    I have a few Fenix products for more than 7 years and always proved very reliable and carefully designed products.
    This time Fenix overtake themselves!
    The white is unbelievable bright and balanced!
    This is a top professional tool that is extremely useful,light and carefully designed.
    It’s highly recommended.

    1 out of 1 people found this helpful. Was this review helpful to you?
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