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thetrickster

Member Since 30 Nov 2013
Offline Last Active Today, 01:39 AM
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#377314 Panasonic LUMIX GH5 for underwater video

Posted by thetrickster on 22 September 2016 - 05:58 PM

Yes. You're right. 4:2:2 10bit will not be for 4k@60.

And yes the card format will be SDXC UHS-II.

It was on one of the Facebook GH4 groups I think I saw this info / photos


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#377307 Winter musings

Posted by thetrickster on 22 September 2016 - 12:43 PM

Hi Swift,

You are at a very good (and bad) time for upgrading. First reaction - Wait for the new camera reviews in 2017 and the AX100 replacement and decide then.

An external recorder for your current camera I don't see giving you any extra image quality it will still be 8bit and 4:2:0 - although uncompressed - its still has a lot of data stripped from the sensor. So unless you fancy a super nice viewfinder - It wont be worth it.

The 'first' generation of consumer 4K cameras with 4K@30p are now 2yrs old (GH4 and AX100 as an example) and the current mid tier models (GX8, A6300) are not really setting the world on fire with hardly any improvements (well apart from the A6300 when it overheats!)
So obtaining one of these first 4K cameras, you could get a bit of a bargain and still have a great improvement in image quality - IF you can get one for a bargain.

The Sony A7 Mk II's are interesting - with their amazing low light and also fast phase detection AF. Alas the limited lens choices for me don't sit well. Plus they are not cheap and you know Sony will have the Mk III's out for Christmas!

Its odd at the moment, that we are caught with DSLR type cameras having massively better image quality than camcorders (DVX200 not much better than the GH4 (and no housing), the Canon's/JVC suck at 1080 etc - and that was (at the time) the reason I went down the GHx road (there was no AX100 at the time, when I got my GH3 and housing) and the semi-pro Sonys of the FS5 and FS7 are serious money once you get the firmware upgrades and Sealux housings...

The BlackMagic camera really want a controlled, well lit environment to shine - and when I looked at the BMPCC, it was awful to use in a housing, the amount of hours in front of a PC to convert the RAW stuff - just didn't seem worth it add the fact its a S16 sized sensor so needs super wide lenses to get even a 'normal' wide shot. Everything says no to me.

The AX100 would be a serious contender for me, if I had nothing and needing something 'today'. Pete in Oz has worked out that the Magenta filter fixes a lot of the WB issues and it benefits from all the camcorder features (parfocal lens, OIS, continuous AF that doesn't hunt, ND filters and then you have the video centric options on the housings like the flipable internal filters and excellent buoyancy characteristics) - so a really good choice. It is sadly let down by the awful rolling shutter thou - but others can comment if this has any effect underwater.

If I had nothing and could wait, we have info on the 'new' models coming in 2017 and they are coming with 4k@60p and this along with HDR will be big - very big, as you know the camera aspect of an underwater camera 'rig' is just chump change once you buy housings, trays, lights arms etc - and investing in a 2yr $1000 camera (plus the $3000+ on housing) now doesn't make sense, now we know what is coming.

Need today: AX100 or a knocked down GH4.
Wait for 2017: GH5 or AX100 MkII (whatever they call it)

Im happy with my GH4 and Atomos Flame - its missing a lot of video features - but I've learned to work around them (rubbish AF, no AutoISO in Manual mode etc) - but the image quality I'm super happy with and if the rumours of IBIS are in the GH5 and if they improve the AF, i'll be happy to stay with the GHx series worts and all. (But always with a casting eye on the Reds and FS7 :)


#377220 Panasonic LUMIX GH5 for underwater video

Posted by thetrickster on 20 September 2016 - 12:08 AM

Looks promising. But I don't think I'll be pre-ordering - just yet. There are still a few unknowns which I had hoped would be mentioned yesterday.

 

Apart from your list:

  • V-LOG (rumours from the floor - it will be paid upgrade again)
  • Crop Factor in 4K modes (no mention)
  • It will require the newer UHS-II Type cards (looks like they tried to cover that sticker up and failed.)
  • No word on compression
  • Dynamic range / Better low light



#375327 Out there #3: La Secchetella

Posted by thetrickster on 19 July 2016 - 10:47 AM

Lovely video!




#373681 GH4 - Nauticam Macro Lens/Port Thoughts

Posted by thetrickster on 17 May 2016 - 12:51 AM

 

So I guess you need to buy the zoom gear and substitute one of the three pieces for the printed one. Am I right?

 

Yep, that about it.

 

The zoom gear has springs and is actually quite complicated - not something personally I could design and print. So I needed the zoom gear and modified it.

 

Jussi at deep shots might have a more skilled hand than I - and maybe a better printer to do a more complete custom piece.




#373041 Color Managed Video player..... OMG!!!!!!

Posted by thetrickster on 26 April 2016 - 11:22 PM

I agree that the Scenery profile is much more suited for the Panasonic's underwater. I'm too much happier with it now I'm running that profile.

 

(Which was your suggestion a few months back)




#373040 PADI Photographer White Balance Slate - Gray Scale

Posted by thetrickster on 26 April 2016 - 10:50 PM

'Grey' for White balancing isn't a specific 'grey', can by 18%, can be anything really - the main issue for using a grey card for white balancing is that the card is completely Neutral, so the R,G,B values read off of it are the same - The PADI card is indeed pretty neutral - and its a Matte finish too, which helps.

 

The only issue I would say with the PADI card, is thats its quite dark (for grey) - so some cameras might not like it and refuse to WB off, of it.

 

Don't forget its a $15 card also - they will not be checking the consistency of the neutrality of their cards, unlike XRite or DSCLabs - but for us underwater I think its pretty close.




#372855 Red filters for GH4

Posted by thetrickster on 21 April 2016 - 04:23 AM

That is much more elegant than cutting tiny pieces of magic filter and sticking on the 7-14mm




#372367 FS: GH4 / Nauticam

Posted by thetrickster on 08 April 2016 - 12:59 AM

Camera / Housing

1x GH4 (with two batteries)

1x NA-GH3 Housing with GH4 Upgrade

 

Lenses

1x Panasonic 7-14mm

1x Panasonic 8mm

1x Panasonic 14-42mm PZ

1x Panasonic 14-42mm II

 

Ports

1x Zen 100mm Fisheye Port for Panasonic 8mm (never wet)

1x Nauticam 45mm Port for Olympus 60mm

1x Nauticam 35mm Port for Panasonic 14-42mm's

 

Wet Lenses

1x WWL-1 Wet Lens

1x CMC Wet Lens

1x Nauticam Bayonet Arm Holder

1x Nauticam 67mm Bayonet adaptor for CMC

 

Arms / Supports

2x Nauticam 60x200mm Carbon Float Arms

2x Nauticam 60x250mm Carbon Float Arms

1x Nauticam FlexiTray II W (with DiverVision handle)

 

External Recorder

1x Atomos Ninja2 with 250GB Sandisk SSD and 2 batteries, charger etc

1x Nauticam NA-NINJA2 Housing

 

Tripod

1x XIT404 Tripod for GH4

3x XIT404 Extending Legs

 

Everything is in great condition, well looked after and washed / soaked after every dive. Ports / Domes / Lenses are not marked in anyway. I have the boxes/packing for most of the items.

 

Pricing - keep it simple. Look at the UK Pricing and take 40% off.

 

All the items are located in Spain, but can happy to Ship to anywhere in EU.




#371409 Taking a Poll.. How many of you Check your Rig vs. Carry On?

Posted by thetrickster on 10 March 2016 - 10:54 PM

Carry-on. All camera and computer kit. Hold is for the CCR and dive kit


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#371028 The ultimate GH4 video rig! What is it...?

Posted by thetrickster on 02 March 2016 - 09:19 AM

Stuart, many thanks for the clarifications. Splendid. Learned something today! :)




#371014 The ultimate GH4 video rig! What is it...?

Posted by thetrickster on 02 March 2016 - 03:06 AM

Not sure Stuart! LOL

 

From my (mis)understanding I thought the BBC et al (via the EBU standards) have certain minimum requirements for source footage depending on the project, and within the finalised project there could be no more than 25% percentage of footage which could be captured with cameras which do not meet the required standards due to the nature of the shot (environmental, drone, on-car etc etc). The final project would then have to be delivered in the required format

 

http://dpp-assets.s3...tandardsBBC.pdf

 

So coming back to my original point, GH4 internally recorded footage doesn't meet their standards, but could be used for broadcast - but only within the 25% percentage of the final project?

 

Happy to be corrected, as I don't want to be wrong myself nor pass on duff info!




#370738 The ultimate GH4 video rig! What is it...?

Posted by thetrickster on 21 February 2016 - 10:50 PM

Hi Matt

 

I had the lens behind the zen 170mm dome. So very similar to the 180mm.

 

Using it for recording 4K, you won't find much wrong with the corners. But for 4:3 photos, where it uses more of the FoV, you will see the blurriness.

 

If I were buying a dome again, I would look at the 180mm at a minimum - or even the 200 or 230mm (via the n85 to n120 adapter) but they travelling with a dome this size becomes an issue.

One of issues with using WWL lens is that you are using a standard zoom in the flat port. The standard zooms are not very fast (f3.5 at the wide end) Would love a constant F2 .8 zoom lens starting and 14 mm!

 

Sadly even the 14mm primes you can get, appear from the reviews to be worse than the 14mm end of the zooms - which is odd.

Its heavy (but not much more than a large dome mind) and its slightly fisheye'd compared to the wide angles behind a dome - but only very slightly.

 

Benefits... Sharp corners, more FoV (130 vs 114), OIS and flexibility to boot.

I can't believe how good the combo is. (So sorry if I sound like a broken record praising it :) )




#370736 The ultimate GH4 video rig! What is it...?

Posted by thetrickster on 21 February 2016 - 10:27 PM

Hi Matt,

If one of your primary goals is for hand off to broadcasters. You will need the Atomos Shogun (or Assassin) also. This will eat $3,500 for the housing alone.

Why do I say you need one? Most of the broadcasters have certain requirements for the quality of their clips (with exclusions for a small % of the final output) which will require unedited 4:2:2 footage at a minimum.

As an example from SKY TV in the UK:

SKY:
"All HD commissioned content delivered to BSkyB should use the AVC Intra 100 codec. The video should be encoded to the standard using Intra frame at 100Mb/s with 4:2:2 luminance/colour difference sampling ratio, level 4.1 with a 10 bit sampling depth. The 100Mb/s codec also stipulates a full horizontal resolution."

BBC:
All material delivered for UK HD TV transmission must be:* 1920 x 1080 pixels in an aspect ratio of 16:9* 25 frames per second (50 fields) interlaced - now known as 1080i/25.* colour sub-sampled at a ratio of 4:2:2

The GH4 only shoots 4:2:0 internally.

The other option(s) would be:
An Atomos Ninja2 (in a NA-NINJA2 housing) but you would be restricted to 1080p, but you get the 4:2:2 @ 220 Intra.

Or get a BlackMagic Pocket camera, but again it's limited to 1080.

Most of the broadcast stuff you see is filmed on FS Sony's, Red etc.

Soft corners, you need to go big on the domes - if going for a wide angle lens like the 7-14mm. However due to the 2.2crop (in 4K mode) you will find that this is minimised quite a lot with the GH4.

However I still found it soft, so went with the WWL wet lens and a standard zoom.



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#370693 Decided on a new micro 4/3 setup now need help deciding on which camera?

Posted by thetrickster on 20 February 2016 - 02:04 PM

ImageUploadedByTapatalk1456005801.847943.jpg


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