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Everything posted by matdiver1234

  1. No problem, i am aware of this color noise and have no idea how to get rid off in post. I have this noise with 10bit too. Maybe its because the higher ISO of 1600 which i use. For the colour noise - well, first of all, most people wouldn't even notice because the shot is just great, it's only nerdy pixel peepers like us lot here on Wetpixel! However, have you tried Neat Video? I've had good results. You can try the demo version, and play with the settings. I also use the GH5 up to 1600 ISO. I won't hijack the thread by posting other videos, but you can check in my signature the one I did from the Maldives. All the mantas were shot with ambient light at 30m, and I used NV in post.
  2. Great - thanks for sharing that! Really enjoyed watching. Brings back some good memories of diving down there. You were lucky with the dolphins! Cheers, Matt
  3. Thanks a lot for posting this, Davide. It's been 20 years since my last Spanish lesson, and I'm a shallow water diver... but I still found the movie totally captivating. Watched it right through non-stop. Incredibly beautiful. Yeah, Rafa's totally in another league, I agree with troporobo's comment. Cheers, Matt [video enthusiast ;-) ]
  4. What Aquatic Images said! Very nice shots and editing. What was the music btw? Videos like this just make me want to get in the water again.. it's been way too long! Cheers, Matt
  5. Hi, it's been a while since I last dived in Sardinia, but I have really good memories of the north-east region, round Isla Maddalena and Lavezzi (that dive site is actually off the south-east coast of Corsica). Lavezzi is a special place, because you can see lots of groupers at a site called Merouville ("Grouper city"). Generally speaking, expect very good visibility, not a huge amount of fish (compared with the Red Sea, obviously...), and nice underwater scenery. Check out these guys: https://www.scubapoint.info/en/ This being Italy, the food and wine are simply amazing! Cheers, Matt
  6. Really nice video Thani, especially for the current situation when most of us can't go diving due to lockdown. A pleasure to watch, all the way through. I love the way the fish just split, e.g. around 4'35", .... and those colours! Looks like a great dive site. Which lens were you using for the crocodile fish at 7'10"? Cheers, Matt
  7. I went looking for whalesharks, earlier this year.... no luck there, but plenty of mantas! [media]https://vimeo.com/352696720[/media] Mantas are at the beginning and again at 2:45. Panasonic GH5, Nauticam housing. Cheers, Matt
  8. Thanks for the comments! Yes, this was all ambient light, and the location was "Sheik Malek" - same general area as Abu Dabbab and Marsa Shagra. Seems there was a period when there were very few sightings and now there are more sightings... but it's probably just the same few individuals that are moving around. @aviator8 - I think you've identified what you have to do. Really look at the screen whilst you're filming. I try and lock my arms and rest my elbows against my body as well, but I think many of us probably have to discard some shaky footage from every trip! Also, sometimes I slow down 50fps footage to make it appear more stable. After that.... practise practise practise! Cheers, Matt
  9. After many attempts, I finally saw a dugong in the Red Sea: [media] [media] The rest of the video is just the usual Red Sea stuff, mostly in the 10-20m range so ambient light/manual white balance/red filter. For GH5 owners: the lizard fish (2'32") is what happens when you insert a 6K photo/video file (i.e. 18 megapixels at 30 fps) into a 50 fps video. The porcupine fish (2'13") was in a place that looked very dark, 15m down under an overhang. However I dropped the frame rate to 25 fps, and shutter to 25 too, with ISO at 1600. Quite good low light capability, at least for something that isn't moving fast. All constructive comments and criticisms welcome! Cheers, Matt
  10. Very nice. I really admire the macro work especially. What was your lens set-up? Cheers, Matt
  11. Hi, I would have thought that a liveaboard in the Maldives would be your best bet, or maybe South Africa but it's the wrong time of year for the sardine run. Having said that, even in the right season and the right area, I still didn't see a whaleshark in the Maldives during my last trip! Cheers, Matt
  12. I think this thread is even more topical now than when it was started, at least as regards video lights, which are becoming incredibly powerful. There's a thread on here at the moment discussing the merits of a light pumping out15000 lumens, e.g. I haven't seen any precise scientific data either, but what String said on 20 Jan is also my experience. Surely, we can use some common sense? who among us likes an incredibly bright light shone in their eyes? what about your kids and pets? isn't it just possible that marine life is, at the very least, going to become more wary over time with divers shining such bright video lights at them? (leaving aside the question of whether or not it's actually harmful). As divers, we surely have a responsibility to our fishy friends! Yeah, OK, morays and hunting lion fish at night don't seem to care.... As for strobes, well, I don't do photography, but 1/250' just doesn't seem like it would be the same as 20 seconds of bright video light in terms of impact on behaviour. Also what that scientific paper concluded with regard to sea horses. Just my 2c. Matt
  13. Very nice, especially the thresher footage. Must have been quite dark at that depth, so early in the day!
  14. Very nice! Especially at 1'45". It's like that nurse shark just wanted to test the autofocus capabilities.... Thanks. Matt
  15. Hey Thani, personally I find those colours absolutely awesome! I'll definitely try experimenting with a grey card next time out but, as you probably know, I'm actually really happy with the MWB on my GH5 (red filter/grey translucent plastic). Using ambient light like in your video gives everything a much more natural feel, IMHO, plus you avoid having to deal with backscatter and annoying the marine life with thousands of lumens in their eyes. At around 2'50" you were filming inside the wreck, and I'm pretty sure the GH5 wouldn't have handled that anything like as well. Very nice video! Matt
  16. GH5 + Nauticam. WB really does work, and 4K 50/60 is just great to have. 10-bit 1080 50p, 10-bit 4K 25p, 1080 up to 180 fps, 4K up to 1.... someone on here said they could not really think of what more to ask for, and I agree. In practice DoF depends on aperture surely? I use the PZ 14-42 3.5-5.6, and DoF isn't really an issue. I guess with your +5 diopter you would have to be careful, but one of the great advantages of 4K is that you can crop and still end up with a full HD image, so you don't always need to be fully zoomed in underwater. Also, 50p slowed down to 25p in post looks very smooth. I don't do macro, but the best macro stuff you see on vimeo etc seems to have been filmed with a tripod. Don't forget that you'll need a decent computer and good NLE to edit! Just my 2 cents! Matt
  17. @bubffm yeah, you may be right. Only way to be sure is to go on another dive trip and do some more testing... Anyway, I've done a revised version with colour correction now, and a different soundtrack of course ;-) https://vimeo.com/257754338 Matt
  18. kun1 - yes, red filter from Aditech/Mangrove, that I got with my old 10 Bar/GH2 setup. Screws onto the front of the port (M67). Using a filter is like a night and day difference, especially below about 8m;
  19. Many thanks for the comments, it's really a big help to have this feedback! Matt
  20. Thx for the comments! About the violet water - my holy grail is absolute minimal colour grading in post, because grading slows editing and rendering. Unfortunately, on this trip I did something a bit stupid before a whole bunch of dives which was to experiment with setting the saturation in camera to +2. I guess I need to do some more colour grading after all.... If the grading works well, then I'll replace the video. Davide - yep normal PZ 14-42, but it's behind Nauticam's WWL-compatible port (N85, GH5 variant). There is maybe 1mm at most between the front of the lens and the port. There are certainly better quality lenses, but it's small, cheap, versatile, and you can control the zoom electronically with a Fn button. The manta close-ups were at 42mm. Matt
  21. https://vimeo.com/257754338 My first time in the ocean with this cam., so I'd really appreciate any constructive criticism. Shot mainly in 4K 50p, very little colour grading due to MWB, but exposure adjusted on quite a few of the shots. Pana PZ 14-42 lens. Cheers, Matt
  22. Yeah, I know what you mean. Would have been even worse, i.e. more pink/red if he was closer. I have very mixed feelings about these high power lights. I'm very impressed by the tech and the relatively small size, but generally I don't feel that comfortable shining really bright lights on turtles and our fishy friends! All down to personal preference I guess, but I wonder if it could influence fish behaviour in the long-term, maybe even push them to find somewhere less "disruptive"? As regards noise, in my experience MWB can have as much of an impact as ISO. It seems like what's going on when you get a good MWB at 20m, say, and all the reds and yellows look nice, if you then point the cam at something out in the blue the "red boost" translates as noise. The few times it occurred I corrected it very easily with NeatVideo and reducing the red in Vegas curves, but the point is that at the same ISO there was no visible noise for the colourful reef shot. Matt
  23. @lutfu for your ISO values, just open/import the file in the free PHOTOfun software that comes with the cam. There's useful info available if you just right-click on the thumbnail, including ISO, shutter, aperture etc. Matt
  24. "AFL hold" is buried in one of the menus somewhere. Switch it to "on" and you're good to go. Point at something a couple of metres away, e.g., press AFL once, and that's it. No need to re-focus between shots, unless you want to. Before I went on the trip, I thought that I would be using 1080, 50fps 10-bit. However, the advantage of 10-bit seems to be above all in "extreme" grading. I couldn't see any difference on any of the (not very modern) screens in my house. 4k gives you the advantage of being able to zoom in a little at least in post, and provided your shutter speed is twice the frame rate, i.e. 180 degrees, then the slo mo from slowing down 50 fps is really useful. Things like shots that just lasted 2-3 seconds in real time can be made to stand out a bit more. If you want to go to less than 42% slo mo however, then you have to use 1080. I just put these different options in my custom pre-sets, so it's easy to switch. Variable frame rate is only available with manual focus of course.... One bizarre problem I had was that the camera completely froze at the start of a dive. I had just pressed AFL. Nothing I could do underwater would unfreeze it, including turning it off, pressing any of the buttons, etc. Only after the dive when I could take the battery out and re-insert it did the camera work again. I noticed that there were loads of "this video file cannot be played" on the card in the slot I'd been using. I realised that after a few days' use and transferring my shots every day to the hard drive, the card would probably need re-formatting. It seemed to do the trick, and the problem didn't occur again. Matt
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