Hello again to my blog. This second blog leans a little towards the customization and technical side. In terms of risk and potential disaster, I mean you could ruin your equipment with one wrong move kind of disaster it is equivalent to a category 5 hurricane. So here is a WARNING – don’t do this at home!

A few months ago a friend approached me with a wager. It was a kind of wager one does with friends when inebriated with a few beverages. The challenge was to make an existing underwater housing fitted with wire sync bulkheads to work with an optical slave strobe like an Inon strobe for example. Two strobes in fact – as bravado clearly took the better of me.

A week later and the results…..?

Take a perfectly innocent looking Patima 400/450D housing preferably not own by anyone. I choose this because the camera has a pop-up flash. The canon’s eTTL flash is complicated if one has to wire it for a bulkhead and even harder to fit a circuit in-line to trigger a strobe electronically and get any form of TTL flash at the business end but there is one method that works. The Canon pop-up flash and optical slave TTL strobes like Inon Z240 Type III works well together. Another thing about the Canon pop-up flash is that it will flash even of it is not so fully popped up! This saves a lot of room inside the housing and Patima has a bit of room on top of the camera so it was destined for a make over.

The housing from the inside looks clean and free of appendages. The circle marked the spot for some major surgery.

Milling took about two 5 minutes. It was not a difficult Tracheotomy…..

Now to shape the Acrylic rods into…..

these ‘thingys’………………………….

Perfect fit!

The thingys or a more fancy named ‘optical ports’ was skewed with some stainless steel sleeves. To strengthen it and also to fit a 1 mm sheathed fibre optic cable.

A bit of epoxy carefully smeared on to hold the optical ports in place and also to seal any gaps.

Once dried testing could be done. Oh just in case any of you sharp-eyed hawks out there the port is indeed a M5 Nexus focus port which incidentally fits the Patima !

Finally the result after the test dive at Manado. Incidentally not long after this experiment Patima decided to introduce ‘optical ports’ in their housings and only for Canon. However, I have also conducted mods on Nikon D80 housing but that is another blog.  Now for the next wager…. Stay tuned. D

Dave’s first Scubacam blog

Welcome to my first Scubacam blog. This will be a regular feature here and if you decides to visit from time to time you will find that I might have written something new from time to time.  Things like dive trips, gear, underwater digital photography and videography. The best of all for you gadget fans, I will write mostly about …gadgets….especially my gadgets!

Let’s start with a bit of ramble on a recent trip I went on August last year, the Rodney Fox Great White Shark Expeditions at the Neptune Islands, Adelaide, South Australia.
A friend, Julian Cohen organized it. In his spare time when he is not organizing or going to trips he is pretty nifty with his camera.  He takes photos both in and out of the water – take a look here. See what I mean.

Here I was testing the polecam in my shop.

Another friend, Jason Isley also came along and he is one of the first ones of Scubazoo.  Well, let’s just say he’s a real pro. Shoots all sorts of wildlife video for the likes of the BBC and Animal Planet. You name it and he has probably shoot it – including a few TV celebrities. Now he shoots mainly digital stills.

I custom made a pole-cam for Jason for the trip. It is detachable in sections and great for traveling as it weighs less than a bag of o-rings and strong enough to dangle a fully laden metal monster like a Seacam. Handy for those close encounters with the great whites.

On the first day Jason was up at the crack of dawn trying out the pole-cam instead of jumping into the shark cage (may be the cold water has something to do with it).

"here fishy fishy fishy" Photo by Matt Thorp

We waited for inestimable amount of time and no sharks appear. And as soon as Jason turned his back a nine foot GW shark suddenly poke out of the water and tried to chew on his Nexus housing.

Photo by Matt Thorp

Jason was  determined as only a pro could and was trying very hard to take “scary” close up pictures of Jaws. There was just a small problem that none of us foreseen. That is in using a dome port with a wide angle lens the minimum focus distance of the lens and port combined have to be known.  We just triggered away and got shots of tails and fuzzy shark mouth full of fuzzy shark teeth. It was really trial and error before we realized that the camera refused to trigger at the right moment, but once the distance was correctly judged Jason began taking some  scary and toothsome shots.

Photo by Jason

Now using a polecam is useless without the control. Here I am going into a bit of shameless self promotion. The Nexus is rigged up with an underwater Aquatica remote control plugged into a custom sync socket on the housing made by yours truly. The best way to appreciate the effectiveness of this set up is to take a look underwater. This is a great shot taken by Chris Swannie using Julian’s Subal housing. Julian was shark spotting in case the shark plays the same hid and seek trick again.

Photo by Chris using Julian's camera and housing

This shark came very close and almost took the rig into his  or her mouth…okay at this point I remembered I was informed by Andrew Fox that one way to differentiate a male from a female shark (at least for the Great White variety) is the claspers near the anal fins. Claspers = male??!! Well what do I know they all looked like big “bruce” to me.
Now I do not want to go into the trip details which involved a lot of flying, waiting and land transfers. I just wanted to say I had a great time and the Rodney Fox crew was top notch. I saw seven different great white sharks some have claspers and some don’t.  Want to see my shots? See the Flickr site attached on the top right hand corner. I used a Zillion 5D Mark II, Pro One dome and couple of wide angle lenses, one Sigma 15mm and Canon 17-40mm wide angle zoom. I also packed two Inon Z240 and as back up a Canon 400D in a Seatool housing.

I am planning to go back again this year. Anyone interested in coming too then email me at . August is the best time to go but also the coldest time as it will be winter there. Water temperature is hovering around 10 to 13 deg C. Scorching for polar bears but for me I needed a hood and 10mm wetsuit which requires an Olympic size weight belt to keep me from floating like a man in a very thick wetsuit. You do not even need to bring them, Rodney Fox will provide these.
I will post some HD video clips in the next few blog….so stay tuned.

What a happy bunch....