Showing posts with label Underwater. Show all posts
Showing posts with label Underwater. Show all posts

Tuesday, 19 May 2015

New double video light rig





Trying something new for a video light right. When the lights are bolted onto the side of the Goodman handle I find the backscatter to be quite noticable, so this new rig is to push the lights further away from the camera and at an angle to reduce it... Its experimental at this stage... but here goes...

Ingredients:

Loc-Line Coolant Hose Pack
Description
Standard Pack of Coolant Hose containing 2 x 5.3/4" of 1/4" hose (10 Segments),
3 Nozzles (1/16, 1/8 & 1/4")
 and
1/8" &1/4" Male NPT Connectors.
£12.76



EPDM Rubber Lined P Clips Air Hose Pipe Clamps Cable Retention Tube Clip Mikalor
( 251259923794 )
Material: W1 Mild Steel Zinc Plated DIN 3016 (PHC-**)
Sold Per: 5 (Five) Clips Pack
Size: 26mm Pipe Retaining Clamp
£3.85        for the 4000lm torch




M4 SOCKET ALLEN CAP HEAD HEX KEY SCREW BOLT A2 STAINLESS STEEL (ABOLT-FTB)
£1.35 for 10

M3 M4 M5 M6 M8 M10 M12 A4 MARINE STAINLESS NYLOC NYLON INSERT HEXAGON LOCK NUTS
( 111035553279 )
£1.20

100g Polymorph Thermoplastic

To fix the loc-line to the Goodman handle I've cut the threaded section off the loc-line base. Its quite thin so a junior hacksaw will do it easily.



Then bolted the base to the handle with the bolts threaded through the base.



Once both loc-line bases are bolted securely to the handle I made the connectors for the torches. For these I used the nozzle ends provided in the pack, choosing the two largest ones. The finished product looks like this:


To make the hole for the bolt I used a soldering iron, it could be drilled but its quite a hard polished plastic so melting a hole was a lot easier.



Passing the bolt through...


I later added a washer either side but its not shown in these photos..

To make the hose clip connection more rigid, I used a small of piece of polymorph plastic to stabalise it. Take a small piece, say a lump the size a coin, melt it in boiling water and then place it between the hose clip and the nozzle end when you tighten the bolt up. It will form into the correct shape and solidify.



You can use the soldering iron to melt the polymorph plastic around the edges to make it neater.

To plug the whole thing together, lay the loc-line pieces in boiling hot water for a few minutes and then apply a little pressure.

The torches I've used in this example are the two LED torches I've previously reviewed on my blog, one with reflector removed for video and just a normal 4000lm torch with reflector.

I've added a chord to tie the torches to the handle, just in case the loc-line is not strong enough. Its 1/4" loc-line, out of water is seems a little flimsy but I'm hoping in water it will be ok. Its the same as the Ikelite kit.

I over tightened one of the nozzle heads and cracked it, so i'm going to reinforce them with some liquid metal or resin.. not done that yet.

First outing this week...

OK, the arms work really well, the connections stayed tight and secure for 6 dives. In the water they support the weight of the torches fine. Out of water they move a little.

The non-modified torch with its reflectors still in, was no good for video, hot spot ruined the video.

The video camera also developed a nasty fault of not turning on... so not to successful!

My 3mm gloves got ripped by the bolts connecting the arms to the goodman handle, so I think the bolts need to be reduced in length.











Monday, 16 September 2013

Sony Action Cam Survives Flood

Got to the seabed at 30m ( 98ft) and tried to turn on my camera and nothing, water sloshing around inside, flooded.

This is with the newer underwater case like this...




With the double video light set-up I had just clipped it to a chest D-ring and an extendable lanyard, it was not in the bag on my belt ( stowed away) and I suspect when we did a roll-off the back, it must have hit something to loosen the front door.

Anyway, at depth I wrote it off and continued the dive.

Once back on the boat, I immediately removed the battery and drained the salt water, filling the case up with mineral water, closing up the case again, giving it a good shake. I did this several times on the boat until I got back to the hotel where i again rinsed it under a tap and left it underwater for an hour to get any remaining salt out. After that, it was drain and leave to dry ( room temperature ). Once home it went into the cupboard with the heater for another 2 days before attempting a power-up and test.

Took the memory card out and inserted a new battery, powered up and it made the right noises. Menu works without the memory card but the Wifi-remote does not. Re-inserted the memory card after checking it on a PC ( in an adpater) that the card was ok and could record no problems including sound.

Noticed the PREV button is not working and the date stamp on all files copied across is 01-01-12 (UK). Just need to reset the time back again.

I think I can live without the PREV button as you can just press NEXT to go round the options.

Next test is to get wet and try the case on its own but looking ok.

I don't think this resurrection is too uncommon as a friends Go-Pro 3 had a similar problem, his only failure was the lcd screen on the back...

The battery that flooded looks a goner. (Correct)...

Whilst looking on the web for a solution I found a Youtube video of a guy dissembling the Action Cam to correct a rattle, I don't have a rattle but this gave me the info to look at PREV button issue...

The two small screws next to the USB port secures the electronics to the case, undo these and you can slide out the camera itself from the case: Take off the USB cover and the facia plate.







Note the corrosion on the screws.
Small battery on the bottom right for the RTC?

Not related to the flooding but noticed this rusting on the tripod mound on the base of the housing....Thread is still ok but greased it up anyway to limit the rust.



Update : PREV button is now working, not sure why!











Sunday, 1 September 2013

Underwater Video Light - Dual light for Sony Action Cam

After the success of my single video light ( with reflector removed) I modded another identical light to fix a number of issues I discovered i.e. a small shadow in the top right corner and add a little more power..

So, I've added an identical light to the other side and moved the lights further closer to the camera itself by attaching them further up the handle.


The second light was modified in a similar way to the first, only the shape of the metal plate is different... rather a square rather than a strip in the first. Still jammed in rather than fixed in any way.




Used the same clip as before, using a bit of inner tube to provide a little extra friction, underwater I found the lights moving when I turned them on/off. From ebay :

EPDM Rubber Lined P Clips Hose Pipe Clamp Cable Wiring Metal & Stainless Mikalor, 27mm pipe fitting.


Going diving next week and will post the results...

Update : Made a slight mistake in diving with the camera set to slow mo which ruined my videos, slow mode underwater is not a good idea.. The camera also flooded on day #2 so i didn't get much shooting done. Did get this clip with the dual light though :-


Update: Another version of this set-up...


Thursday, 27 June 2013

SONY HDR-AS15 Action Cam

My second Canon Ixus 75 flooded again, the plethora of Go-Pros when diving and a recent trip to Scapa Flow seduced me into the world of video... As per usual, instead of following the herd I tried not to go to the default route of a go-pro 3 and choose the Sony action cam. The lense quality, sensor low light capabilities and price brought me to this device. It doesn't have same level of accessories as the go-pro but thats fine...

http://www.sony.co.uk/product/cam-action-cam/hdr-as15


I also bought a spare battery, charger and underwater flat ported door from Sony.. You need a flat port for diving.. google it..
Purchased from John Lewis Stores £199, Amazon £20 and ebay £35 for the door pack.
Action Cam Replacement Doors — 2 Pack
Model number:  AKA-RD1




To  mount it, I used the provided flat surface clip on mount, tie wrapped to a goodman handle. This was in turn secured to me by a retractable lanyard clipped off on my right chest D ring.





Tie wraps (T&B) and not cable ties, are 2mm width for extra strength. Two each side of the mount.




Two tie wraps on each side, going through the holes in the goodman handle and the mount, crossing over to give extra strength.

Retractable lanyard.



To protect it when I jump in, I keep it in a Bowstone pocket on my belt and then remove once in the water. Its always clipped off to the right chest D-ring.. I thought I would need a bolt snap on it for extra security but i've not used it yet.



Its a bit fiddle to get out of the bag but it works. I think thats the bags fault!

Lighting

As my first trip was going to be deep and dark ( like most UK dives tbh) I added a light to the goodman handle.

It was a bit of a lash up and the angle bracket that the light was attached to, seriously rusted... so the mark 2 is shown below. This uses, from ebay...

EPDM Rubber Lined P Clips Hose Pipe Clamp Cable Wiring Metal & Stainless Mikalor, 30mm stainless steel and a M4 X 12 A2 SOCKET CAP HEAD SCREW HEX ALLEN KEY BOLT A2 STAINLESS + Bolt.







I also updated the firmware to the latest version, this gave it more shooting modes but more importantly, introduced the underwater scene mode, essential! 

The biggest issue with this setup is the spot from the light shows up too much on the video, it needs to be diffused. I tried a plastic opaque top from somewhere in the kitchen but it doesn't diffuse enough..





I had the diffuser on a detachable bungey so that I could use it as a general torch but I never did remove it underwater....

This is a frame from the video with the light on full power with the diffuser. As the camera has no viewfinder, its a bit of suck it and see. The torch does have a number of power settings but this didn't seem to remove the spot, just reduce its intensity.




This was my torch shinning from the left ( wrist mounted) which is useful for lighting from the side, its like painting the light..



Here is a picture with mostly natural lighting ( beam from left is faint) , its probably a cloudy day, 26m depth... Its the Hull/Deck of the Dresden...




Next quest is for a better method of diffusing the light. Maybe remove the lense and just have the LED "bare" or another material in front...? Watch this space...

Some initial observations :

I thought the flat port was quite obtrusive and might cause a leak if it were knocked, but so far so good.. after a week of fairly abusive behaviour its ok.

In the 170 degree mode ( wide angle), I noticed I could see the flat port lense and a bit of image distortion at the periphery which annoyed me. I think you need to stick to 120 degrees underwater. Maybe blue water diving would be ok but in green/dark. I also found my primary light caught the edge of the port and caused a flare mark.

Battery life is quite impressive, I did 6 cold water dives without changing the battery, I only changed it after that to be safe at 40% ish. This is one thing I had heard about the GoPro 3 that sort of put me off.

Although I bought mine 3-4 months after the firmware upgrade, the one I purchased from the store was old firmware i.e. didn't have the underwater mode. Its not big deal but just don't get disappointed the mode is not there initially, download and install, easy.

Accessories, well there not as prevalent as the GoPro fittings but it does have a standard tripod mount which opens the door to quite a bit. I used the supplied quick release mounts to attach to the goodman handle.

GoPro humidity pads fit inside fine. In fact there seems to be quite a bit of space around the camera ( 2mm ;).

The wireless feature is a novelty, I don't think I will ever use it, there is a version without wifi which is cheaper so that might be a better bet. 

Price, i like, it cost me £199 from John Lewis and another £35 for the door pack.  Given the environment you takes these devices into and their propensity to flood ever so often, I'm not laying out mega bucks...

I've put some sample videos on my Youtube channel..

http://www.youtube.com/user/johnohuk2

Or 

Vimeo 

https://vimeo.com/user19212157

A new firmware version was released in June which I didn't notice, just loaded it and have yet to get it wet, new version is v3.0.0, previously I was running v2.0.0.

Update:

Just got back from a Red Sea liveaboard..... Northern Wrecks and Reefs... Dual light worked a treat, really brings out the colours on the reef... limited range mind, maybe 1m max in good conditions...but definitely worth it because just a little light is needed to turn from a dull blue into something else..

https://vimeo.com/90581529

I'll try to put some of the wreck penetration videos up soon...