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#21 Cp

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Posted 02 June 2014 - 11:08 AM

Chris, what did you use to WB off? A white/grey slate or your hand or something similar?

I am off to dive with the Great Whites in South Australia in 2 weeks so i'll be shooting with the 7-14mm also.

Cheers Pete.

 

Mostly the palm of my hand, but the shark belly works too. The hand is nice because it has a little bit of yellow and magenta in it such that the WB doesn't go too far. I am trying to come up with a good white balance card that would be good for different depths; I made one up last year and it worked well for some depths but not all. 


 

Why such a high range of ISO? Did you want to ensure the apertures were small to have corner sharpness? Seems like the conditions in your video were ideal

 

Shooting at 96fps mean the shutter speed should be about 1/200, and I also wanted to be able to shoot at f/8 or f/11 to make focus easier. For a static subject, not to important, but you can't exactly place the sharks where you want them. 

 

Cheers,

Cp


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#22 Cp

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Posted 02 June 2014 - 11:10 AM

Chris. You say Cyan head + filter. Can you tell more?
The colours in the video were great.


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Thanks. The Keldan LUNA 8 lights have an interchangeable head; several heads are available including the two I used here:

CRI - high color rendition index (light "quality")

Cyan - high color temperature (for use with filters)

 

Cheers,

Cp


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#23 Cp

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Posted 02 June 2014 - 11:19 AM

 

Can you please tell us how much the whole set up weighs: camera, lens, housing, port, lights, arms?

 

Is it small enough to carried in pieces in a big backpack onto a plane?  (if one ignores the carry-on weight limit)

 

Regards

Peter

 

HI Peter,

Sorry, I didn't weigh it. And I carried two complete kits (GH4 and 70D) which were inter-mingled, so not sure about the fitting into a backpack. But I carried almost all of the two rigs in a roller and a backpack. Roller of course got gate checked on the little puddle jumper to Cat Island. 

 

Cheers,

Chris


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#24 Interceptor121

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Posted 02 June 2014 - 01:23 PM

even if you shoot at 96 fps what is your final output format? What can play 96 or even 48 fps properly?


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#25 thetrickster

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Posted 02 June 2014 - 01:32 PM

Thanks Chris,

What lenses were you using with filters?

As to frame rates.
Wasn't it proved that recording at 60fps and slowing down in FCPX or Premier actually produced a much shaper image than using the VFR features.. (Using optical flow blending).


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#26 Cp

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Posted 02 June 2014 - 01:53 PM

Thanks Chris,

What lenses were you using with filters?

As to frame rates.
Wasn't it proved that recording at 60fps and slowing down in FCPX or Premier actually produced a much shaper image than using the VFR features.. (Using optical flow blending).


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Both 8mm and 7-14. 

 

Proved? How can someone "prove" that? Maybe one person's opinion. But optical flow and the like (twixtor) generate false data, i.e. they make up data they don't have. They do a nice job, sometimes, and I used optical flow in a few of the clips in this video. I thought the 96p VFR was really good; 60p VFR is possible a little better but I personally would rather go shoot that measure pixels like that. 

 

Cheers,

Chris


even if you shoot at 96 fps what is your final output format? What can play 96 or even 48 fps properly?

 

It records at 96fps but plays back at 24 or 30, for a 400% or 320% slowdown. It even plays it back like this on the LCD, so you get the slow motion when you review it. 

 

Cheers,

Cp

 

Edit: Interesting how the forum merges two replies like that, even though I entered them separately. 


Edited by Cp, 02 June 2014 - 01:54 PM.

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#27 Pete L

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Posted 02 June 2014 - 03:57 PM

Thanks for your response Chris, I'll try out my palm & also the sharks belly.
Another thing I like about the GH4 is the fact that you can have 4 custom WB settings so I can have one set for the surface cage & another for the bottom cage & maybe an in between also.
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#28 thetrickster

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Posted 02 June 2014 - 10:40 PM

 
Both 8mm and 7-14. 


You retro fitted the filter holder from the 8 to the 7-14mm and using magic filters?
 

 

Proved? How can someone "prove" that? Maybe one person's opinion.


I agree its just an opinion. There has been some quite in-depth testing over on Personal-View forums of the 96fps feature and it vs 60fps slowed down.

Thanks for all the replies Chris. Got any more sharky GH4 videos to share? :-)


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#29 Cp

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Posted 03 June 2014 - 07:27 AM

You retro fitted the filter holder from the 8 to the 7-14mm and using magic filters?

 

Nope, just used scotch tape. Didn't use magic filters... I used a combination of some old school wratten filters. 

 

I agree its just an opinion. There has been some quite in-depth testing over on Personal-View forums of the 96fps feature and it vs 60fps slowed down.

Thanks for all the replies Chris. Got any more sharky GH4 videos to share? :-)

 

Sometimes people do this sort of testing and it becomes gospel on the internet. And sometimes they are right and sometimes wrong. There are lots of examples of where someone said something on the net and people just run with it. Internet crowd-think. Or non-think. I bump into people who shoot Canon at ISO 160 or 320 thinking that is the "native ISO" because of a test that someone posted a couple years showing sensor noise with with the lens cap on. I used to try to explain how that test is wrong and what they are actually doing is needlessly cutting their dynamic range by 1/3 stop. I've generally given up on that and just kind of nod my head. Next time I want to shoot with my lens cap on, though, it'll be at ISO 160... :)

 

No more to share today, but I need to finish my video from Anilao that I shot with 1DC. Probably won't be this week as we have both the Cine Gear show and the Long Beach Scuba show this weekend. 

 

Cheers,

Cp


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#30 recd

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Posted 04 June 2014 - 04:36 AM

 

 

 

 

I saw drawings of the GH4 housing yesterday. And that's all I can say about that :)

 

Cheers,

Chris

Chris

 

Are you able to elaborate on your comment yet?

 

Can I infer that more than a change to the setting/lock dial is planned?



#31 thetrickster

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Posted 04 June 2014 - 04:55 AM

Integrated Handles, Vacuum Check, horizontal shutter release, new style port and housing locking.

Look at the A7R housing and move the buttons around to match the NA-GH3...

This is what I've been told



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#32 Nick Hope

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Posted 04 June 2014 - 07:32 AM

And a glass port (that may be 180mm)



#33 ScubaBob

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Posted 04 June 2014 - 10:46 AM

Do you all know if the new housing will still be compatible with the old style M43 ports (e.g. 12-50mm Macro)?


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#34 Pete L

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Posted 04 June 2014 - 03:18 PM

Larger buttons would be nice too, mainly the instant focus & PLEASE GIVE US MANUAL FOCUS!!!!

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#35 recd

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Posted 04 June 2014 - 04:13 PM

Release date?



#36 Nick Hope

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Posted 04 June 2014 - 08:27 PM

Larger buttons would be nice too, mainly the instant focus & PLEASE GIVE US MANUAL FOCUS!!!!

 

Are you talking about the 12-50? I've kind of only just clocked that there doesn't seem to be a focus gear for that, which is a serious drawback (there is for the 60mm macro port). What focussing methods did you try Pete?

 

Release date?

 

I got a little info from Phoebe Lu last week.

 

(Mods - may be worth merging and renaming these 2 (or even 3) GH4 threads?)



#37 Pete L

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Posted 04 June 2014 - 11:18 PM

Yeah Nick, no manual focus on the 12-50 or the 7-14.

I just used auto focus & then switched in to manual focus to lock it & stop it from hunting.

There is a switch on the back of the GH4 to flick between manual & auto focus.

Focus peaking only works in manual focus too.

I would kill to have manual focus for both of these lenses.

I hope as the Gh4 becomes more popular then there will be manual focus options available to us.

It is really my only serious complaint so far.


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#38 edmond320

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Posted 05 June 2014 - 12:32 AM

Hi Pete,

Manual focus ??? 

I have the new Nauticam 6" dome port (for 7-14) , with manual focus knob, a few months ago already.



#39 edmond320

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Posted 05 June 2014 - 12:35 AM

13739443173_731ae920ae_b.jpg
The new 6" dome port is now have a manual focus knob.


#40 Pete L

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Posted 05 June 2014 - 01:46 AM

Oh what!!!! I didn't know that existed!
When did that come out Edmond?
I am going to wait until the 8inch glass dome is available & if that has manual focus I will go for that, otherwise I will get this one then.

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