Tag Archives: flash trigger

Underwater Strobe Triggers for Sony cameras

When I got my A1 I looked at strobe triggering together with lenses housing and ports as for photography you will be mostly shooting with underwater strobes.

I got in contact with Shane Smith and Cindy Shaw and I asked them what they used and what their experiences were.

Shame has recently been highly commended for UPY and provided me a detailed breakdown of the Turtle TTL trigger. I recommend having a look at his website for great shots with Sony A1 here.

Cindy instead had a Nauticam manual trigger and we exchanged some messages on the burst functionality and the rear curtain sync.

Shane also owns a Nauticam trigger and both confirmed that this trigger only works with mechanical shutter and front curtain.

I use rear curtain on certain shots so I went on the lookout for a trigger that would support it that was not TTL.

I do not want to open a discussion on manual vs TTL however I shoot flash top side and even there I never use TTL unless I have to do a documentary/product shot and I have no time to prepare.

Strobe Trigger Options for Sony

I went on the lookout for options and my research included the following manufacturers:

  • Nauticam
  • UWTechnics
  • TRT Electronics

The following table is a summary of the various units I have directly or inderectly assessed.

BrandModelPrice (€)TTLRear CurtainHSSBurstMultishotPowerProgramming required
NauticamMini Flash Trigger294NoNoNoYesNoBatteryNo
UWTechnics11075- HSS/TTL Converter485YesYesYesYesNoBatteryNo
Turtle ManualTurtle Manual299NoYesYesYesNoRechargeableNo
Turtle Smart TTLTurtle Smart387YesYesYesYesYesRechargeableYes
Strobe Triggers for Sony

Only Turtle triggers seemed to offer all the features I was looking for so I contacted Pietro Cremone at fotosub shop after a long discussion with Turtle electronics technical team who did some remote tests for me on an A1. The A1 can trigger flash with electronic shutter and this is something I was looking for.

Turtle Manual vs TTL

The turtle TTL trigger has all the feature of the manual in addition it offers TTL of course and a cool feature called multishot.

I personally do not have any interest in TTL but my main issue with this product is that in order to change for example from front to rear curtain you need to reprogram it.

I wanted a solution with no computer where I could control all settings from the camera and is not TTL. This is achieved only by the Manual Turtle Trigger.

Turtle Manual Trigger In detail

The turtle manual trigger is really a joy to use and is extremely well built.

The first consideration is that it is housed with no electronics showing so an occational drop of water is not going to fry it. The second is that the battery is rechargeable. I have experience with Nauticam trigger that suddenly my strobes would stop firing consistently as the battery was low without warning. The fact that you can recharge the trigger each day or whenever you like is a great feature.

USB charging with standard micro USB

The second consideration is that the unit is really small and light.

In a hand

Finally the version I got had a convenient rubber part to inser in the housing strobe trigger sockets. This is a part from the TTL trigger that will allow to fire with cheaper cables and does not come as standard on the manual trigger, you need to request an upgrade which I warmly recommend.

So I set the trigger in my A1 housing and so far after around 1000 shots it has not failed once.


Turtle Manual controls

The good news is that well there are no controls everything is set in the camera menu. Here are the steps for my A1 but all Sony cameras are pretty much the same.

  1. MENU →  (Exposure/Color) → [Flash] → [Flash Mode] → desired setting.

Menu item details

 Flash Off:The flash does not operate.

 Fill-flash:The flash works every time you trigger the shutter. (Front Curtain)

 Slow Sync.:The flash works every time you trigger the shutter. Slow sync shooting allows you to shoot a clear image of both the subject and the background by slowing the shutter speed.

 Rear Sync.:The flash works right before the exposure is completed every time you trigger the shutter. Rear sync shooting allows you to shoot a natural image of the trail of a moving subject such as a moving car or a walking person.

This means I can set the flash mode each shot if I want to without changing any settings on the strobe or elsewhere.

In order to access the HSS mode you need to turn wireless mode on

  1. MENU →  (Exposure/Color) → [Flash] → [Wireless Flash] → [On].

This is not wireless mode but the trigger tells the camera HSS is supported and you get a indicator WL HSS. Your shutter speed is not capped anymore.

Unless you have an HSS capable strobe this setting should be left Off otherwise your photos will have the shutter in the image. I do not have HSS strobes but if you own Retra this is very useful.

Other positive points of the Turtle trigger:

  • Supports electronic shutter (only applicable to A9/A1 series)
  • Supports Speed priority with A1 (1/400 on mechanical shutter)
  • It works with SINGLE core and cheap cables when used with the upgraded LED unit

I had sourced two expensive multicore Nauticam fiber cables after my Nauticam trigger refused to shoot consistently and now with the turtle am back at shooting my 15 years old Sea and Sea cables.

Well seasoned Sea and Sea Fiber cables

It also works with ebay single core fiber home made cables.

Probably the only limitation for me is the burst speed. With electronic shutter the A1 goes at 6 fps the trigger would only fire once probably a limitation of the internal LED recharging circuit.

However in mechanical shutter it would work with the Low speed setting of 3 fps.

Take into account that the strobe will deplete its charge when you shoot continuously and the recharge time that are typical mean that when the capacitor holding the charge is empty the strobe will stop firing or fire at much lower power.

Consider the following Log2(burst speed)->minimal output power reduction required in stops for practical use.

In my case log2(3)=1.58 round up to 2 stops reduction of strobe power.

With Sea and Sea YS-D2 maximum power 32 maximum sustained burst rate 32 – 2 stops = 16 this is the maximum you can fire your strobes at.

Realistically you are not going to be able to shoot smaller aperture than f/11 with a diffuser before the strobe starts loosing power in the following shots unless you increase your ISO. This however is plenty for me and frankly it was more academic.

I want one how do I get it?

If you are UK based please send £285 using this link and one will be shipped to you within two weeks. This will ensure you have two years warranty and no paperwork import duties etc to deal with due to Brexit. The trigger will have the higher power LED as in this article.

If you are in Europe I recommend fotosub shop of the friend Pietro Cremone he deals in larger quantities and can offer great prices.