dives

Looking for skeletons

One of the pleasures of underwater photography is learning about sea life which many divers don’t even know exist. The Skeleton Shrimp (Caprella linearis) is one such species. They are not exactly tiny (up to 2cm long) and are actually really quite common. It’s just that they are very difficult to see. They spend their lives clinging to other sea life, grabbing food particles from the water. They are usually seen on hydroids, because they are easy to spot there, though they inhabit many other hosts which get them into the current, such as Dead Men’s Fingers, but are much harder to spot on those.

So it was, I spent a very enjoyable dive in Loch Creran recently hunting for these critters. They have often been photographed before and I wanted to make a different kind of image to what I had seen previously. By using a high-power diopter, I concentrated on just the head of the creature, shooting across the hydroid fronds. Shooting an abundant species allowed me to hunt down a suitable rock with a conveniently placed hydroid, so I could shoot without disturbing the fine silt ubiquitous at this site. I like this shot because it shows the shrimp through the fronds of the hydroid, like an elusive jungle animal seen through the undergrowth. The shallow depth of field of the diopter ensures subject separation by throwing the hydroid out of focus.

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On the other hand, this second capture unintentionally caught the shrimp with its claw arms wide. It made me smile because whereas the first image seemed to say “you can’t see me”, the second seemed to say “Ta-da! Here I am!!”

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Nikon D500 + micro Nikkor 105mm + Nauticam SMC.

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dives, equipment

Through the looking glass…

During a recent trip to lovely Loch Linnhe, I spotted a tiny juvenile squat lobster hiding in a decaying piece of wood. I have to confess to an addiction to these charismatic creatures; I love their bright orange colour, the Popeye aggression with which the wave their claws and the intricate detail of their jointed bodies. I had promised myself that I would not shoot any on this trip, but I decided to change that to “I won’t shoot any adults” (I *nearly* managed that).

In fact this gave me a change to try out two diopter lenses for getting closer to tiny critters. On the first of two dives at the same site from a beach in Kentallen, I tried out a fairly standard +5 wet diopter and the following day, I tried out a Nauticam SMC, a much heavier and powerful lens (lent to me by a friend).

I found the SMC easier to get focussed (for both lenses, I used autofocus to get the focus to the correct position and then “rocked” to get the subject in focus). The shallower depth of field of the SMC gives a more pleasing effect, but I was more interested in how sharp the images might be – it was hard to get the images properly focused, but I am pleased wit the results from both. The SMC gives higher magnification and adds drama to the image, but its much harder to get it in focus. In particular, it is important to get ones “ducks in a row” – in other words, the points in the frame which need to be sharp must be in the same plane. This makes framing the image hard at times – I like the composition below, but I was struggling to get both of the squattie’s eyes sharp.

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Both images have been cropped from portrait format but have the full width of the frame.

Top: D500, Nikon 105mm + Nauticam SMC, ISO200 f/32, 1/100s.
Bottom: D500, Nikon 105mm + AOC+5 diopter, ISO320 f/20, 1/125s