Backscatter Smart Control TTL LED Universal Flash Trigger for OM System & Olympus
Universal TTL trigger for underwater strobes — precise exposures with OM/Olympus cameras
Overview
The Backscatter Smart Control Optical TTL Flash Trigger is a compact, hot shoe–mounted LED trigger that gives you accurate automatic flash exposure with compatible OM System and Olympus cameras, plus Backscatter Mini Flash, Backscatter Mini Flash 2, Backscatter Mini Flash 3, and the Backscatter Hybrid Flash. It comes in different configurations for Sony, OM System, and Olympus, with universal versions sized to fit most housings and a Nauticam Sony version shaped for a direct drop-in fit in Nauticam full-frame Sony housings. You can run either dual LED trigger lights for housings with built-in optical ports or clear windows (using the included foam blocks), or a single LED trigger light paired with an optional bulkhead for a more direct and secure connection.
Inside, the trigger uses Backscatter’s proprietary Smart Control Optical TTL system, a digital optical TTL language that sends a coded signal through a fiber optic cable for precise exposure—more consistent than slave or mimic TTL and less maintenance than hardwired electronic sync cables. Smart Control and Smart Control Macro modes are tuned for the Mini Flash 2, Mini Flash 3, and Hybrid Flash, giving reliable TTL even at very close distances where other TTL systems often overexpose. This makes it easier for new shooters to flatten the learning curve (no constant power changes), and helps all photographers handle changing subject distances, surprise encounters, and fast settings changes. The built-in rechargeable battery runs up to 13 hours, automatically drops into standby when the camera sleeps, and charges over USB-C in about two hours, with clear LED status and battery indicators so you always know when it’s ready for the next dive.
- What it is: a universal TTL trigger with built-in rechargeable LED system for underwater strobes.
- Best for: OM System or Olympus camera users using Backscatter Mini Flash 2, Mini Flash 3, or Hybrid Flash underwater.
- Not for: cameras from other brands if you need TTL — for non-OM/Olympus cameras TTL won’t work (manual only).
- Key compatibility: OM System / Olympus cameras + Backscatter Mini Flash 2 / Mini Flash 3 / Hybrid Flash; works in most housings with available space above camera and optical ports or clear window.
- Important limitations: requires either housing optical ports or clear window (for dual-LED option), or an optional M16 bulkhead adapter if using single LED; Panasonic lenses are not compatible with TTL or RC mode on this trigger.
Compact, Hot-Shoe Mounted Design
This trigger mounts directly onto your camera’s hot shoe and remains compact enough to fit into most housings. It’s unobtrusive so you don’t lose ergonomics or underwater balance when adding it to your rig.
- Small footprint: 43 × 27 × 21 mm (1.7 × 1.1 × 0.8 in).
- Lightweight: 6.3 g (0.57 oz) — minimal impact on handling.
- Standard hot-shoe mount works with most housings.
Built-in Rechargeable LED Trigger — No External Batteries
The trigger uses built-in infrared LED transmitters and an internal rechargeable battery, eliminating the need for bulky external cables or separate battery packs.
- Runs up to 13 hours per charge.
- Charges via USB-C — full charge in about 2 hours.
- Includes LED data cable, protective cap, foam-block mount, USB-C charging cable, and EVA carry case.
Smart Control Optical TTL & HSS with Backscatter Strobes
Thanks to its digital optical TTL system, this trigger translates camera flash data to your underwater strobes — delivering accurate automatic exposures even underwater. It supports both standard TTL and HSS (High-Speed Sync) modes for creative flexibility.
- Compatible with Backscatter Mini Flash 2, Mini Flash 3, and Hybrid Flash strobes.
- Supports TTL modes “Smart Control (SC)” and “Smart Control Macro” — the latter is optimized for close-up/macro subjects. }
- HSS supported (up to 1/8000s, depending on camera settings and strobe) with HSS-capable flashes.
- Underwater wide-angle shooters using Olympus/OM System + Backscatter strobes who want TTL simplicity.
- Macro or close-up underwater work using Backscatter Mini Flash 2/3 with Smart Control Macro mode.
- Travel divers needing a compact, low-profile trigger that fits most housings without bulky cables.
- Underwater shooters who want easy switching between TTL, HSS, and manual flash modes without changing hardware.
Pros
- Compact and lightweight — minimal impact on underwater housing balance.
- Built-in rechargeable battery and LED system — no need for external power or bulky cables.
- Supports TTL, HSS, and manual modes with Backscatter strobes — good flexibility for different shooting styles.
Cons
- Only supports TTL with specified Backscatter strobes — other strobes will require manual mode.
- Requires housing optical ports or clear window (or optional bulkhead) — may not fit all housings.
- Panasonic lenses not supported for TTL/RC mode on Olympus/OM cameras.
Why Backscatter & What’s Included
This universal trigger is made by the recognized underwater photo equipment brand Backscatter, with model number BS-TR-OM1. It ships with all necessary accessories (LED cable, USB-C charger, foam mount, protective hot-shoe cap, EVA case) and is eligible for standard returns under Bluewater Photo’s policy. Backscatter also offers ongoing tech support, including setup help and lifetime advice for underwater photographers.
Free shipping over $200 · Lifetime support included
With this trigger, enjoy automatic, accurate underwater flash exposures — focus on the shot, not the settings.
- Backscatter HF-1 Strobe — powerful hybid strobes
- Backscatter MF-3 — compact macro focused strobe
- Backscatter AF-1 Flash — perfect for travel, with plenty power
Learn More — Guides & Articles
- Best Underwater Camera for 2025 — our top picks for underwater photography.
- Best Dive Computer — our top dive computer picks.
- Best Underwater Strobes for 2025 — latest lighting & strobe recommendations.
- Best Video Lights for 2025 — our favorite continuous lights.
Specifications
- Model Number: BS-TR-OM1
- Description: Backscatter Flash Trigger Universal Version
- Compatible Camera Models: OM System & Olympus Cameras (TTL, TTL HSS, MANUAL, MANUAL HSS) / Other Cameras (Manual Mode only)
- Compatible Housing Models: Universal Housing (with available housing space above the camera)
- Compatible Lens Models: Olympus Lenses (Panasonic Lenses Not Compatibe with Smart Control & RC Mode)
- Main Material: ABS
- Data Transmitters LED Type: High Power Infrared LED
- LED Data Transmitters: 2-Way LED cable with USB Type-C End
- Power Consumption: 40mW
- Battery Power: Built-in Rechargeable Lithium Polymer Battery (3.7V 110mAh)
- Battery Charging: By USB Charger DC5V, 0.5A Approx. 2 hours for a full charge
- Battery Operation Time: 13 Hours
- Auto Standby Time: Use With OM Cameras: follows camera’s standby state / Use With Other Camera : 1 minute
- Dimensions: 43 x 27 x 21 mm / 1.7 x 1.1 x 0.8 inch
- Weight: 6.3 g / 0.57 oz1
- Accessories: EVA Carry Case, Foam Block Mount for LED Sockets, LED Data Transmitter cable, USB-C Charging Cable
- Backscatter Flash Trigger
- EVA Carry Case,
- Foam Block Mount for LED Sockets,
- LED Data Transmitter cable,
- USB-C Charging Cable
We offer lifetime support with all purchases.
Please call or email us with any questions; our knowledgeable staff would love to assist you.
Backscatter Smart Control TTL LED Universal Flash Trigger for OM System & Olympus — FAQ
- Does this trigger support TTL with any strobe?
No. TTL is supported only with Backscatter Mini Flash 2, Mini Flash 3, or Hybrid Flash strobes. Other strobes will work only in manual mode.
- Will it fit any underwater housing?
Only housings with space above the camera and either optical ports (or a clear window) for the LEDs, or an M16 bulkhead (with optional adapter) are compatible for TTL functionality.
- How long does the battery last, and how do I recharge?
The built-in battery runs up to 13 hours per charge. Charging is done via USB-C (included cable), full recharge in about 2 hours.
- Does it support high-speed sync (HSS)?
Yes — HSS is supported with HSS-capable strobes when used with OM System / Olympus cameras.
- What’s included in the package?
The package includes the trigger unit, LED data-transmitter cable, USB-C charging cable, foam-block mount for LED sockets, protective hot-shoe cap, and a EVA carry case.
