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briand123

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briand123 last won the day on March 30 2013

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About briand123

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    Sarasota FL
  1. briand123
    I actually have used a cloth covered flex tip valve on a power inflator hose to carefully do this on several occasions out of need (had to risk opening the housing for some reason on a open boat.) Never used a 2nd state regulator directly to do this personally since I had the tip. This was on a large volume housing where no typical silica gel pack is going to help ( not a go pro.) Obviously I didn't blast full-flow 100psi air in unabated, and expect most handling underwater cameras would think about why that isn't a good idea. Maybe I should add a disclaimer here. lol There is no beating letting A/C'd air fill the housing before you close it up if you know the dew point of that air is safely below the coldest temp you'll experience during the dive. It doesn't matter if you take it outside after you close it and it sweats like a ice cold bottle of beer would, as that is on the outside (though it can freak some people out if they don't understand that.) Even as the air temp inside the housing rises or falls with the ambient environment, the dew point remains constant inside the housing as long as it's not opened.
  2. briand123
    The GoPro heating up has nothing to do causing any fogging. In fact, it heating up during the dive will actually work against fogging by raising the air temp some inside the housing. Fogging all comes about from the air inside the housing cooling to the point it where it hits its dew point temp. The more moisture in the air, the higher it's dew point temp. So, you want the driest air inside the housing possible with the lowest dew point. The key is the air is dry enough so the dew point is lower than the coldest water temp you will experience during the dive. Then you will have no fog. The easiest way to do this is to load the camera in a cool and dry environment (i.e. in A/C )and not on the deck of the boat. If you must open it on the boat deck, you could try to put it in a clear bag to close it and blow some air from your second stage into the bag just before you close the housing. Scuba air is less than 10% humidity, so the dew point will be very low. Just be very careful not to blow any water that may be on the reg into the housing or bag. -Brian
  3. briand123
    It's been just about one year since I shot my first 360 underwater video using my self designed and built HD 360 rig. Since then, I've made some changes to the number of cameras, power management, and control system over the last year to increase the reliability and improve the results. Here is a 360 I shot on the deck of the USS Vandenberg in June. Flat Panoramic 360 version on YouTube: Fully Interactive 360 Videos using Adobe Flash for PC or Mac: 360 Immersive Videos Note the the original 2 minutes of Vandenberg video at full HD resolution is over 6GB in size. The online 1/3 resolution and bit-rate compressed version is only 65MB. Let me know what you think. Regards, Brian Dombrowski SubsurfaceMedia.com
  4. briand123
    There are glitches at the seams for several technical reasons. Parallax error being one at close distances to subjects, and the need for more overlap in frames from the various cameras. It's a work in progress, but it is progressing to better results as I throw time and money at it. Some folks have asked for 'sphere' views but if you have ever tried navigating one of those, they usually get abandoned by viewers in frustration as the viewer gets lost. There will be new videos with a lot more action and color as the water warms here in FL and i tweak the system configuration some. At this time, I'm not prepared to disclose details on my custom setup and workflow just yet. My goal is producing content for the next few months. Thanks, -Brian
  5. briand123
    I have a new 360 video of USS Mohawk from the starboard deck with some cudas and AJs swimming through. Some minor wrinkles in two seams but i understand the issues and how I will work through them in the future. This is 1min 30 seconds and only 20MB in size for web. I think the quality for the file size is pretty decent trade off. The full quality and res file is over 4GB. New 360 video from starboard deck of USS Mohawk Regards, Brian
  6. briand123
    Here's a new underwater 360 video using my second iteration design allowing for more vertical field of view. We shot from six vantages points on the wreck. This first one is the shot from the bow deck. Vis was 30 ft. First 360 underwater video from bow of the USS Mohawk Regards, Brian D.
  7. briand123
    Yes, nor iPhone. The reason is you need a web browser that supports the free Adobe Flash plugin to play 360 videos. The deal is Adobe Flash is the only prominent technology capable of playing 360 *video* in a browser. Apple was mistakenly hasty to thumb it's nose at Flash and ditched it for HTML5 before HTML was even close to accomplishing what could be done in Flash regarding video. Android followed suit about 6 months ago. HTML5 browsers need to support OpenGL before they can support 360 videos.
  8. briand123
    Hello diving photogs. Just a heads up that the 100ft dive liveaboard "Ultimate Getaway" is running a special trip Sept 5 - 8, 2013 to dive some great SW FL offshore wrecks known to harbor schools of Goliath Grouper. These dates are right at the peak of expected aggregation maximum (new moon of Sept.) I was on this boat in early Oct of 2010 with David Doubilet shooting Goliath images & video on the Baja California wreck for 2 days. We saw dozens of clustered goliath eventhough peak aggregation was well over by then. That trip inspired me to work with Ultimate Getaway to plan a dedicated trip targeted to finding goliath schools on SW FL wrecks. Here is the link to details on the trip we came up with: 2013 Ultimate Getaway Goliath & Wreck Photo Trip Regards, Brian D.
  9. briand123
    I won't say shooting a full sphere *video* underwater is impossible but it's close to impossible. Still photos are much easier because the azimuth and nadir shots can be done afterward. The video has to be done in real-time. The reason the up-down buttons don't do anything by default is the video is already at full field of view vertically. If you zoom in, you'll see the buttons then have an effect. This was shot at 720 vertical and I've increased it to 960 for some more recent projects which has given me more range. I have a modification in the works that will expand the vertical range by another 33% on top of that. -Brian
  10. briand123
    I've completed my first 360 underwater video using multiple GoPro Hero2 cameras in a custom designed and built housing specific to this purpose. I made the first full test run with running cameras in October and unfortunately the vis was only 20 ft and I was at 70-80 fsw with fairly low light. So reds are absent even after an attempt at color correction in post. Here are links to two presentation formats: Interactive 360 video version This is only a start. I plan to add radial lighting to the housing over the winter. Let me know what you think. Thanks, Brian
  11. briand123
    Here is some night dive video I shot with these self-built CREE heads at 70% power. I find if I run them at 100% for more than 5-7 min continuous, I get an over-temp issue with the driver circuit protecting itself and dropping the power automatically. The camera is a HC7 in an USVH with the WB locked at built-in *daylight* color temp preset. Night dive using Ikelite heads rebuilt with LEDs.
  12. briand123
    The desiccant has nothing to do with it. You can't wildly pan the camera around like that and expect the video to come out 'normal' with a rolling shutter CMOS sensor camera. Obviously, this isn't an issue because no one in their right mind would intend to shoot like you did intentionally, but if you google around and see the problems people have shooting rolling shutter cmos cameras in vibration environments (i.e helicopters), or the artifacts when doing quick pans, you see 'waving' effects like this. It's inherent of the design.
  13. briand123
    Ok. I just got back after making 7 dives on a wreck 60 miles out in the Gulf of Mexico in 115 fsw. I shot about 1 hour of video on my HC7 using my prototype CREE LED heads. I also did a couple shots with the GoPro hero w/ and w/o lights at 115fsw. Since my HC7 in my USVH housing doesn't allow for manual white balance underwater, I usually just fix my white balance at 'outdoor' during daylight dives and then correct my footage in post. I just put up some raw images in my latest gallery which are simple frame grabs from the HD video. I used no color correcting filters while shooting and then only post processing done for these test images was deinterlace and resize. Overall, I'm very pleased with the results. The light color temp is consistent at various power levels and my batteries never drained low enough to hit the shutdown threshold even after three 42 min dives on day one. Please check out my latest gallery for the LED test result frame grabs. I will get some video up soon.
  14. briand123
    I was on a trip with David Doubilet and Jen Hayes just a few weeks after diving the Baja California wreck about 65 miles off Naples FL. (October 1-3, 2010.) I got to shoot along side him and helped the scientists by mounting lasers to my video rig to take Goliath measurements. We talked shop a lot on the 7 hour trip back to Ft Myers. I have some vid of him auto-bracketing away at 115 ft. I call it "David and Goliath". A frame grab is in my WP gallery.
  15. briand123
    I bought a Sartek housing for GoPro Hero HD to work around the underwater focus issue. The quality of the modification is excellent, and they pressure tested it to 250 fsw pressure before shipping. I think it was around $100. There was no vignetting at all at 1080p mode. However, and 1280x720, there was vignetting. Hoping that GoPro will fix their stock housing so that there is no need to buy a 3rd party housing to deal with this going forward. Brian
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