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Member Since 26 Nov 2002
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#342970 Palau: Mating Humphead Parrotfish Aggregation Video

Posted by CheungyDiver on 06 February 2014 - 02:58 PM

Well here is one of many clips of the spawning. Shot six in the morning so the video is a bit grainy. Shot using a 5D MIII with ML. 16-35 II f2.8L and Nauticam housing with a CheungyPro one dome. Sorry no music.  Best watch in HD.      





music added- curtesy of Vimeo!

#342585 Are we ready for 4k?

Posted by CheungyDiver on 29 January 2014 - 06:43 PM

Yep. Beeb is investing heavily on 4K mastering of nat. history content. Quite a few of the production houses is using Epic and Sony F55 (although the codex is still iffy). Since 2011 all the commercial shoots for UW I was involved in has been shot in 4K plus. Some uses Alexa topside (for 2k raw) but for UW its 4K and it is mostly Epic . Even some 3D TV movies for CCTV (China) and HK based productions are shot using 4K + cameras. The general public may not notice much as content shown on TV, network and Internet is mostly HD and even SD but the under current is definitely there for higher fidelity. Most are badly compressed.  People have  choices. Some are happy with SD or HD and will stay with that. Blissfully care less about anything new. Good for them. I don't agree with up-resing HD content to UHD. Its crap . Better to have the footage shot at 4K natively or higher. Like I said before the 4K resolution is here to stay. That does not mean HD or SD is going completely fade away overnight. 

#341001 Blackmagic 4k Production Camera resurfaces from Limbo

Posted by CheungyDiver on 22 December 2013 - 04:51 PM

There is already a UW housing waiting for this latest Black Magic offering. Philip Bloom also had a go with the 4k footage colour correction. Not entirely convinced what this camera could really do. At the moment I am really enjoying the BMPCC and my new housing. Had to do some DIY with a battery pack. Now I think a full sixty min. Dive is possible with the camera on the whole time. The housing is nice and small. Footage from this little pocket rocket is really nice. I can't wait for the meta bone lens booster. Off to Palau in the next day. This new BM 4 K might take a while from their past record on delivery. I think it's the first in the industry I could get a housing before I could even get the camera..LOL

#338795 GoPro 2 fogging remedy?

Posted by CheungyDiver on 29 October 2013 - 08:08 PM

Hmmm bit late to the party. Gopro housing has a small volume so any splashes when you open the box after rinsing  will quickly heat up next time you use the box. Capillary action will wick some moisture to the inside of the seal. Tiny amount.  My solution....wait for it....toilet paper. Good old loo roll works. Single ply or use the luxurious double ply for extra softness and absorbency.  All you need is a single sheet and fold it so it cover the bottom (yes its a pun) of the box (more pun?) The tissue need to be dry obviously and will surprisingly absorb the humid air when the Gopro heats up. Change the sheet each time you open. The best thing is the tissue is ubiquitous and you could wipe of splashes when you open the box. Simple and useful.  


As for why noise appears and inconsistency I think Peter explain most of it. Lack of control and also we are dealing with a tiny sensor. Now the new version is even smaller. Sensor heats up and lack of space for processing and cooling all contribute to the problem. Go Pro is a POV camera so I would not expect it to be a main videocamera for important footage. Always do tests and in doubt use a videocam that offer better features.



#337067 magic lantern 5D 2K DNG RAW

Posted by CheungyDiver on 16 September 2013 - 01:44 AM

Agreed. Bigger CF card say 256GB with sustained speed of 120 mb/s and I am happy camper. For the 5DMIII at least. I think more importantly  that a stable firmware version ( Beta?) of the ML could be developed with all the wrinkles such as skip frames ironed out then the firmware could ready for the mainstream. Editing software is already catching up with direct edit of various raw files. I am having a blast in any case with this ML firmware even now at alpha stage. 

#336821 How do you (un)screw short Ikelite dome port?

Posted by CheungyDiver on 08 September 2013 - 08:32 PM

Grip cloth. Stuff you use to put on table to prevent stuff from sliding. Cheap and available in any supermarkets. You could wrap this stuff over the rim and then strap wrench over that. It will help when everything is gripped tight for big heave.

#335862 Fully corrective port and wet lenses - Underwater Photogrammetry and camera c...

Posted by CheungyDiver on 15 August 2013 - 05:22 PM

Hi Pedro77


You could try Nikonos lenses. They could be way off the mark from what you need. There are literally tons of Nikonos lenses at giveaway prices. Try a few of them and see. From my own experience these lenses are made for water contact and most will not focus topside but UW they are tack sharp and distortion free. The higher end Nikonos RS lenses are even more sophisticated. I have re-chipped a few of them and have added aperture rings and they are probably the best UW corrected lenses there is. They are again designed by Nikon just for underwater photography. I have done some experiments myself. Even made a port that could make the Nikon 14-24mm working without too much corner distortion.  Let me know what camera and focal length I may be interested in studying this further.




#334559 Yet another 3D Red Epic Housing

Posted by CheungyDiver on 18 July 2013 - 06:05 PM

Okay. Gotcha. The whales are pretty big even for the humpback calf.  Although the calf could get really close. I think you guys going to get some stunning footage. 


Brilliant idea to hook up two Deep X and an external mirror beamsplitter rig. I wonder which forum inspired Pawel with that idea ;)?  He will need some seriously good rig to stop all the movement. Salt water resistant stages. I can't wait to see that set up. 






#333121 Anyone tried the AOI RGBlue video light?

Posted by CheungyDiver on 20 June 2013 - 07:06 AM

Its a big pond. The reason for warmer colour temperature and not to be confused with CRI or colour fidelity is perception. Warmer color temp helps me to perceives the subject and foreground in a way like using sunlight at really shadow depth- plus balancing a sunlit scene is easier. It is highly subjective. Not that noticeable and usually only when really powerful lights fill the shadows. Hence the saying the you can never bring enough lighting.    Shooting video raw these days makes balancing percieved colour easier. In fact it does not really matter as raw records much more information then AVCHD and even 422. As long as the exposure is correct and no clipping of the highlights and the shadows. In another post I discussed about HDR and ETTR. ETTR is something I am experimenting for video. I really like the way it helps to get the most details in the highlights in digital stills. It is another technique and I will not discuss it here.   Back to lights. Personally what I look for in lights especially LED is colour fidelity. Not all LED is made and give out the same color spectrum. In fact in the same production LED batch the colour rendering can vary. So absolutely matching LEDs is really just the 10% yield in a manufactured batch. CRI in the 90s is even more difficult to manufacture and strict electronic ballast is needed. One of the reason why RG Blue do not provide longer burn time is the power draw. The analogy is like a comparing a match with a gas hub. You get more heat from a gas hub. So more power is needed to get all the colour and a good balanced spectrum. Cooler colour light does not draw as much power but there is always sacrifice. Not saying the Fix neo or other LED lights are in that category but the CRI for lots of lights are in the 70s. Bigger battery will help longer burn time. One of the reason why Keldan Luna 4 is big and the Luna 8 bigger still. I think RG Blue may be looking into larger capacity battery.   BTW putting a colour filter does not provide more CRI. If the LED has missing lines in the spectrum then even recording in raw the colour is interpolated in post production. For Internet okay for TV network okay. Not cinema stuff. I am over simplifying this of course. There is also colour absorption downwards and sideways. I'll leave that in another post.   cheers

#332080 Add on to the Airlock Vacuum thread

Posted by CheungyDiver on 29 May 2013 - 02:35 PM

hi Andy


Yup and its the same valve used by myself and others for more than a decade. Repackaged, recycled and a dollop of marketing plus blinking lights and suddenly a must have. I have my hand pump with vacuum gauge also used for almost a decade. Still working.




#330199 Blackmagic Pocket Cinema Camera: Yes there will be housings!

Posted by CheungyDiver on 24 April 2013 - 06:01 AM

http://johnbrawley.w...in-your-pocket/ Oops someone beat me to it..     Just a run and gun footage. I think it is bye bye 5DMIII and GH2 or 3. Well not really if you want to shoot digital stills too.    A bit of rolling shutter but manageable. This will so eat into Go Pro on Multicopers and flying stuff.     The sensor is a 2.88 crop to be precise. For UW use a FE lens. Should be okay. I can't wait for it. 

#330105 Amphibico Genesis 700 for the NEX-FS700

Posted by CheungyDiver on 22 April 2013 - 06:06 AM

here are some pictures taken at ADEX of the Genesis and Rouge.



Attached Files

#329892 Blackmagic Cinema/Professional 4k Camera housings

Posted by CheungyDiver on 17 April 2013 - 05:23 PM

The "pocket rocket"BMDCC camera I am sure will outsell the other 4K camera. At under 1K USD its a no brainer for lots of people. It is a movie specific camera  and useful as B or C camera in tight situations or as a crash cam. Or a multicopter cam.  It will definitely eat into Go Pro 3 territory unless Go Pro comes out with a changeable lens POV cam.


From the specs point of view...2K prores is still very relevant. Faster workflow and less "frightening' in terms of post production hardware requirement. Just my opinion but I think UW manufacturers will not ignore this camera. It s not even reality until BMD delivers so a few months for design and prototyping then may be third or last quarter of this year before you see one. I hope to get the camera first and if the size fits I will modify some other housing and do some tests. I really like the MFT mount. Just about any lens could be adapted and used.


Right after the NAB hype the litmus test is delivery. No confirmed shipping dates and no out in the wild footage shot and graded yet.........wait wait wait.



#329789 Amphibico Genesis 700 for the NEX-FS700

Posted by CheungyDiver on 15 April 2013 - 06:20 PM

Too early for them to have all the adapters worked out for the ring and port. At the moment they are compatible with Sony e lenses. The 18-55 & 16 with 0.75 wide angle adapter. e lens is electronic zoom and focus. manual lenses could use the Aquatica focus port system. I am sure some existing gears could be easily made to work. 


There is no reason for not looking at more lens options for FS 700 especially when the CV. Odyssey  4K recorder could be accommodated in another housing (yet to be made) and also bdouble up as an Oled monitor. Just supply and demand. I am not sitting still. I will definitely look into the Metabone.




#329787 Nauticam Rossa for Red Epic/Scarlet

Posted by CheungyDiver on 15 April 2013 - 05:49 PM

I have been testing the Nauticam Rossa in Lembeh Straits recently. Too busy to do a full review but will later. Probably after the ADEX show.


Here are some teasers.



Attached File  LemRossa1.jpg   487.77KB   76 downloads


Not the best visibility at the time. The housing is well balanced. The slider weight at the bottom helps to adjust the centre of gravity of the housing. The finger tip controls are a joy to use. In this case I could balance the housing on the legs. I attached two ball arms in front in case I need more stability. Two more at the back and you have a quad-pods that could be made stable in any situation.


With the Nikon 105 VR macro it is more like 147mm macro. S35 sensor has a crop factor of approx 1.4 with FF lenses. I was surprised to see the size of the image on the screen. Great working distance too.






Attached File  LemRossa2.jpg   364.74KB   77 downloads