The D500 is Nikon’s long awaited update to the D300. With blazing shooting speed and Nikon’s first dive into 4K video, see how this camera performs in the water in our full review with images and video.

Underwater Camera and Housing TTL Reference Guide

TTL is an automatic strobe exposure system and a great tool for underwater photographers. TTL systems allow you to focus on strobe placement while it figures out the best strobe exposure. It’s not fail proof, but modern systems have become surprisingly accurate and help make underwater photography even more fun.



We’ve assembled this reference guide to help you identify the various TTL options for your brand of housing and camera. This guide is not an attempt to demystify the subtle complexities of TTL systems, but something we like to use when discussing TTL options with our customers.



Select your housing brand from the index below and give us a call. We look forward to help you select the best option for your favorite types of underwater subjects.











AQUATICA TTL OPTIONS


Internal Ikelite TTL Circuitry for Canon

(Electronic)


Aquatica and Ikelite have teamed up to offer Ikelite's Internal TTL system on select Aquatica housings such as the Canon 5DS R and 7D MkII housings. This TTL system is only compatible with Ikelite strobes. A command dial on the exterior of the housing allows for quick access to either TTL Exposure compensation or manual strobe output.









External Ikelite TTL Converter for Nikon

(Electronic)


The Ikelite External TTL Converter will allow Ikelite DS strobes to be connected to nearly any housing for Nikon with a Nikonos 5 pin or Ikelite 5 pin electrical bulkhead strobe connector and 5 pin hot shoe. The TTL Converter is equipped with a simple rotating switch that allows toggling between TTL and manual exposure.









Pop-Up Flash

(Fiber Optic)


Many cameras include a built in, pop-up flash. This flash can be used to optically trigger strobes. Sea & Sea and Inon are both TTL compatible when shooting with the camera's internal flash. Using a camera's pop-up flash is the most affordable TTL option, but also the slowest method of shooting TTL. The primary limitations to using a camera's pop-up flash are the long recycle times of the camera’s internal flash and consumption of the camera's battery.

Aquatica Compatibility Grid



UW Technics

Converter

(Electronic & Fiber Optic)


Internal Ikelite

Circuitry

(Electronic)


External Ikelite

Converter

(Electronic)


Pop-Up

Flash

(Fiber Optic)
Nikon D5YES---
Nikon D810--YESYES
Nikon D500YES---
Nikon D7200--YESYES
Canon 5D IV-YES--
Canon 7D II-YES-YES
Canon 70D---YES
Sony a7 II,

a7R II, a7S II
----












IKELITE TTL OPTIONS


Ikelite Housing Built In TTL Converter

(Electronic)


An integrated TTL circuit is fine-tuned to the flash exposure protocol for the most accurate exposure possible with Ikelite Ds strobes. The circuit is powered by the strobe for zero maintenance and no batteries to change. Exposure compensation in TTL mode is supported using the camera's built-in control.








Pop-Up Flash

(Fiber Optic)


Many cameras include a built in, pop-up flash. This flash can be used to optically trigger strobes. Sea & Sea and Inon are both TTL compatible when shooting with the camera's internal flash. Using a camera's pop-up flash is the most affordable TTL option, but also the slowest method of shooting TTL. The primary limitations to using a camera's pop-up flash are the long recycle times of the camera’s internal flash and consumption of the camera's battery.








Ikelite Compatibility Grid



Ikelite Built-In

Converter

(Electronic)


Pop-Up

Flash

(Fiber Optic)
Nikon D810YES-
Nikon D7200YES-
Canon 5D IVYES-
Canon 7D IIYES-
Canon 70DYES-
Sony a7 II,

a7R II, a7S II
YES-
Sony a6500YESYES












NAUTICAM TTL OPTIONS


UW Technics TTL Converter for Nikon

(Electronic & Fiber Optic)


The UW Technics TTL converter supports both optical and electrical strobe triggering and is compatible with popular strobes from Inon and Sea & Sea. Optical triggering eliminates o-ring maintenance and potential water intrusion over electrical sync cables. Full automatic TTL and manual are supported. The UW Technics converter also supports Rear Curtain Sync.









Nauticam TTL Converter for Nikon

(Electronic & Fiber Optic)


The Nauticam TTL Converter supports both optical and electrical strobe triggering and is compatible with popular strobes from Inon and Sea & Sea. With these converters, optical strobe triggering is the way to go. Optical triggering eliminates o-ring maintenance and potential water intrusion over electrical sync cables. Full automatic TTL and manual are supported. The Nauticam TTL Converter also supports Rear Curtain Sync.









Nauticam Optical TTL Converter for Canon

(Fiber Optic)


This hotshoe mounted optical flash trigger provides automatic TTL Flash when used with Inon S-TTL and Sea & Sea DS-TTL Strobes connected by fiber optic cables. The TTL trigger also offers manual triggering. The Nauticam TTL Converter also supports Rear Curtain Sync.









External Ikelite TTL Converter for Nikon

(Electronic)


The Ikelite External TTL Converter will allow Ikelite DS strobes to be connected to nearly any housing for Nikon with a Nikonos 5 pin or Ikelite 5 pin electrical bulkhead strobe connector and 5 pin hot shoe. The TTL Converter is equipped with a simple rotating switch that allows toggling between TTL and manual exposure.









Pop-Up Flash

(Fiber Optic)


Many cameras include a built in, pop-up flash. This flash can be used to optically trigger strobes. Sea & Sea and Inon are both TTL compatible when shooting with the camera's internal flash. Using a camera's pop-up flash is the most affordable TTL option, but also the slowest method of shooting TTL. The primary limitations to using a camera's pop-up flash are the long recycle times of the camera’s internal flash and consumption of the camera's battery.








Nauticam Compatibility Grid



UW Technics

(Electronic &

Fiber Optic)


Nauticam

Converter

(Electronic &

Fiber Optic)


Nauticam

Flash Trigger

(Fiber Optic)


External Ikelite

Converter

(Electronic)


Pop-Up

Flash

(Fiber Optic)
Nikon D5-YES---
Nikon D810YES--YESYES
Nikon D500-YES---
Nikon D7200YES--YESYES
Canon 1DX II--YES--
Canon 5D IV--YES--
Canon 7D II--YES-YES
Canon 70D--YES-YES
Sony a7 II,

a7R II, a7S II
-----
Sony a6500----YES












SEA & SEA TTL OPTIONS


Sea & Sea Optical YS Converter for Nikon & Canon

(Fiber Optic)


The Sea & Sea optical YS converter uses LEDs to trigger external TTL strobes electronically. The converter mounts inside select Sea & Sea housings. TTL and manual modes can be switched by pushing the mode switch on the housing.









Nauticam Optical TTL Converter for Canon

(Fiber Optic)


This hotshoe mounted optical flash trigger provides automatic TTL Flash when used with Inon S-TTL and Sea & Sea DS-TTL Strobes connected by fiber optic cables. The TTL trigger also offers manual triggering. The Nauticam TTL Converter also supports Rear Curtain Sync.









Pop-Up Flash

(Fiber Optic)


Many cameras include a built in, pop-up flash. This flash can be used to optically trigger strobes. Sea & Sea and Inon are both TTL compatible when shooting with the camera's internal flash. Using a camera's pop-up flash is the most affordable TTL option, but also the slowest method of shooting TTL. The primary limitations to using a camera's pop-up flash are the long recycle times of the camera’s internal flash and consumption of the camera's battery.








Sea & Sea Compatibility Grid



Sea & Sea Optical

YS Converter

(Fiber Optic)


External Ikelite

Converter

(Electronic)


Pop-Up

Flash

(Fiber Optic)
Nikon D810YESYESYES
Nikon D500YES--
Nikon D7200YESYESYES
Canon 5D IVYES-YES
Canon 7D IIYES-YES
Canon 70DYES-YES
Sony a7 II,

a7R II, a7S II
YES--












SUBAL TTL OPTIONS


Subal V1 TTL System for Nikon

(Electronic & Fiber Optic)


About 60% of all Subal older models housings for Nikon can be upgraded with this TTL system. It fits in place of the original Subal electronics for strobes and installation is very simple. Subal TTL V1 system uses two CD2032 batteries. Subal TTL V1 system can be equipped with electrical or optical cables. It is suitable for set of strobes such as the Sea & Sea YS-D1, Sea & Sea YS-01, Inon Z240, Inon D2000 and Inon S-2000.

Subal TTL Converter for Nikon & Canon

(Electronic & Fiber Optic)


The Subal TTL Converter mounts on top the camera and is able to work with both Nikon and Canon cameras. Strobes can be connected via fiber optic cable as well as with standard 5 or 6 pin connector cables. It is suitable for Sea & Sea, Inon, and Ikelite DS strobes. The Subal TTL adaptor can be used in many underwater housings currently on the market.









Nauticam Optical TTL Converter for Canon

(Fiber Optic)


This hotshoe mounted optical flash trigger provides automatic TTL Flash when used with Inon S-TTL and Sea & Sea DS-TTL Strobes connected by fiber optic cables. The TTL trigger also offers manual triggering. The Nauticam TTL Converter also supports Rear Curtain Sync.









Pop-Up Flash

(Fiber Optic)


Many cameras include a built in, pop-up flash. This flash can be used to optically trigger strobes. Sea & Sea and Inon are both TTL compatible when shooting with the camera's internal flash. Using a camera's pop-up flash is the most affordable TTL option, but also the slowest method of shooting TTL. The primary limitations to using a camera's pop-up flash are the long recycle times of the camera’s internal flash and consumption of the camera's battery.








Subal Compatibility Grid



Subal V1

System

(Electronic &

Fiber Optic)


Subal Converter

(Electronic &

Fiber Optic)


External Ikelite

(Electronic)


Pop-Up

Flash

(Fiber Optic)
Nikon D5YESYES--
Nikon D810YESYESYESYES
Nikon D500YESYES--
Nikon D7200YESYESYESYES
Canon 1DX II-YES--
Canon 5D IV-YES--
Canon 7D II-YES-YES
Sony a7 II,

a7R II, a7S II
----






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