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thetrickster

Member Since 30 Nov 2013
Offline Last Active Today, 08:17 AM
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Topics I've Started

Nauticam 180mm vs Zen 170mm Dome?

19 February 2015 - 04:40 AM

I asked this a while ago on Scubaboard, and got an amazing response. Not...
So I'm reposting here, maybe some of you might of tried them...
 
I see Nauticam has now released a n85 to n120 adaptor for fitting the bigger DSLR ports on the Mirrorless port system. 
On the Port Chart, it lists the 180mm Glass Dome and the adaptor (36052) as compatible with the 7-14mm lens. 
 
Anyone got their hands on both the Zen 170mm and the 180mm and seen any differences to corner sharpness etc? What really interests me is the inclusion of the focus knob - and what confuses me is that this adaptor is 47mm deep!
 
I really wish Nauticam would come out with a n85 30mm extension ring with a focus knob!!
 
Maybe some of you have tried some of the even bigger Domes (200mm+) with the adaptor??

GH4 Color Profiles - Which One(s) do you use?

16 February 2015 - 06:27 AM

This weekend, I got a late call up for a dive on Sunday morning and in a rush I grabbed my GH4 and the 14-42mm.

I have been planning to get the GH4 down and do some testing with it -  actually underwater, but I wasn't quite prepared!!

 

I've had a go with all the profiles on land, but have a feeling, the differences don't translate to underwater filming.

 

I was taught that you should shoot as flat as possible and then grade in post, however this is all (in my opinion) absolutely rubbish when dealing with underwater footage, unless you are shooting RAW with a BM camera or similar. We are limited to 8bits and only 4:2:0 - so my current thought is to bake in as much as I can while shooting..

 

Anyway...

 

So got down to 25m and the vis was rubbish, but I proceeded to setup my GH4, white balanced off a slate, pointed at the wreck and starting running through all the profiles, recording 10secs a piece - thinking Vivid would be a good one to start with, as its quite contrasty. I was surprised however that the Portrait profile provided some nicer colors, but again is a bit too flat for my liking.

 

I didn't have time to run through all the profiles and all the iterations (buddy was looking very bored) of shadow/highlight adjustments, contrast, sharpness etc.

So wondered, if anyone else been through the different profiles and found a gem to use?


3D Printed Focus Gearing for 7-14mm (Nauticam)

13 February 2015 - 03:28 AM

Well its been on order for a while, but my 3D printer finally arrived - and I've got straight to work on some custom pieces I wanted.

 

1) Focus Gearing for the 7-14mm

 

Unless you have the 6" Acrylic dome with the focus knob (Part Number: 36164)

or the N120 to N85 47mm adaptor with focus knob(Part Number: 36052) for the 180mm dome, you can' use the focus ring on the 7-14mm lens on a m43 housing.

 

As I'm using the 7-14mm always at 7mm, it was annoying I couldn't use the focus, so well with the help of a Calliper and TinkerCAD, here is the results:

 

Its a bit rough and ready (Need some grub screws to tighten it) - but if this is something someone wants, once I've finished the design, I'll post up the STL file, which you can use yourself, or send off to Shapeways.

 

 


Getting the best results from YouTube / Vimeo (1080, 4K etc...)

24 January 2015 - 08:16 AM

Thought I would start the ball rolling on this one as there doesn't seem to appear to be a one size fits all answer to this...

"what are the best settings / encoder to use, to get the best possible results when I upload a movie to YouTube or Vimeo?"

I don't know the answer so would be great to get any opinions or solutions people have used before. :-)

Someone on RedUser has already spent some time looking at it

http://www.reduser.n...ll=1#post924139

But maybe with underwater footage, the outcome would be different.


Sent from my iPhone using Tapatalk

Atomos Shogun and 4K 4:2:2 10bit - Maybe / Maybe Not

15 December 2014 - 06:30 AM

Howdy All...

 

Anyone seen the news on the new Odyssey 7Q+ ? Not looking good for 4K 10bit at the moment...

 

Quotes from Mitch Gross (from CD who make the Odyssey)

 

"...The official technical spec for HDMI 1.4a or 1.4b states a maximum data threshold of 4K 4:2:2 8-bit. Both the Odyssey7Q+ and the Shogun (according to Atoms published spec) use this HDMI connectivity, so therefore we should both be limited by it.

 
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Video input/loop out
HDMI 1 x HDMI (1.4b)
SDI 1 x 4K-SDI 12G/6G or HD-SDI 3G/1.5G (SMPTE)
Signal Uncompressed 10/8bit 4:2:2 (camera dependent)
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I think some people have been confused by this, but you can also look up the technical spec of HDMI 1.4b yourself. It can only handle 4K at 8-bit. The "Signal" spec above refers to both HDMI and SDI, or at least that's the way I read it. So in that regard, the capabilities of the Odyssey7Q+ and the Shogun match, in that we both can capture 4K 10-bit over SDI and both capture 4K 8-bit over HDMI...."