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Optical TTL and Nikon D7000

Life underwater

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... I have fancied for some time to take a new camera under water which I could use for long-term as I bought my current camera back in 2007 and since then it has been my perfect partner during my dives.Due to the technological novelties which permanently appear in photography usually better, higher resolution and quicker cameras are launched on the market. ...
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Photo: © Dániel Selmeczi

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... The other important and new feature (at least for me) was the optical flash trigger.After the digital revolution nor Nikon, neither Canon offered their new flash technology, iTTL and eTTL , for open source. ...
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... Opinions are divided among professional underwater photographers whether manual or TTL flashes are better or more useful.I vote for the latter, in any event. ...
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... Producers quickly realised the problem, for example IKELITE came out with its own solution for housing and made its DSflashes compatible with digital cameras.The TTL problem still existed at producers such as SUBAL, SEACAM , SEA&SEA, AQUATI CA, etc. ...
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... A few years ago the optic cable solution appeared for compact cameras where the inner flash of the camera triggered the outer flash but its performance had to be controlled manually.Its advantage was that without any electronics it made outer light sources usable through a simple optical cable. ...
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Photo: © Dániel Selmeczi

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... Soon housing accessories for DSLRs has been launched by a Taiwanese producer NAUTI CAM , equipped with optical connection, anticipating the raison d’etre of this method for high-end cameras.Thus became the usage of factory TTL flash control available under water too with absolute freedom and it was named S-TTL . ...
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... Now let’s see what kind of system goes under the water: NIKON D7000, Subal housing, INONz-240 flashes, optical cable, ultralight arms.I do not want to deal with the camera too much as plenty of tests are available on the Internet, I just say that in my private opinion this camera is suitable for almost every kind of situation for any underwater photographer. ...
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... The housing produced by Austrian company SUBAL which has produced excellent quality products for underwater photography in the recent years, as this housing also proves it.Every button and function can be reached from “outside”, on the housing ergonomically designed so they can be managed even in gloves while looking through the viewfinder. ...
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... The flashes come from Japan’s INON and have achieved serious recognition with their compact size and reliability among photographers.. ...
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... The flash works with 4 pieces of AA sized battery and equipped with LED target light, optical and normal cables (in case of the latter only manual control is available).This serious performance out of this small size is just unbelievable. ...
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... First exposure, I see that both flashes work, I open the aperture a bit, another expo and I look at the picture, it’s perfect, I go towards the other extreme f20 and it’s still flawless.I am a bit shocked at the result, both at the speed and the perfection. ...
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Photo: © Dániel Selmeczi

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... After a quick composition, sharpness and light metering is OK, I adjust 0.0 compensation to the flash and expose.The result is perfect, I check the histogram and it is OK. ...
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... I start with one of my favourite themes, the details of sleeping parrot fish as incredible colours and shapes can be discovered in the details.The system works perfectly again, I feel like I was shooting on the surface with a factory system flash, it just cannot make any errors. ...
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... At the end of a test like this the question always has to be raised: Do I want to use this system for long-term? The answer is definitely YES, both the performance and the size of the camera shell are an ideal choice for underwater photographers, the size of the flash is optimal and can be an advantage at flights.Not last, if I want a real TTL than the optical solution can be a key in the future.. ...
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... Text and pictures: Dániel Selmeczi www.selmeczidaniel.com. ...
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... The products mentioned above can be purchased and advice is available at: www.fotosub.hu . ...
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