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Member Since 13 Aug 2008
Offline Last Active Mar 27 2017 12:18 AM

#382145 Newb 'Purple Haze' Question

Posted by thani on 10 March 2017 - 08:25 PM

What video codec you are using?
My friend had a similar issue with his Sony FS100/FS700, I think. It is discussed in detail on this forum. This haze (halo rings) only appears when shooting a subject in a blue water column like your manta shot.
I think it is to do with low bit rate of the codec and thus the compression of data causes such bad rendering of the blue water background. XAVC-S is better suited for video on the a6000 (50 Mbps).
check this link:
If you are already using XAVC-S, then try different color gamma.

#381402 Sony PXW-FS7 underwater

Posted by thani on 10 February 2017 - 05:53 PM

Thanks guys for your comments. Hear is my feed back:

The camera setup:
Shooting mode: Cine EI which gives more dynamic range (around 14 stops)
Color Space: S-Gamut3.Cine/Slog3. I found it better than Slog2 as it renders better underwater colors especially the blue water background.
White Balance preset 5500 (can not be changed in Cine EI mode which is a convenience compared to continuously and manually setting WB. (Lights are used most of the times)
No color filters are used on lenses.

Lenses used:
Zenunderwater 200mm (8") dome all the times - no other ports were used even for close-up shots
Sigma APS-C 17-70mm f2.8-4.0 (OS) with MC-11 adapter for E-mount. This is my dominant lens hence it shoots wide enough (around 26mm FF equivalent) and can do very good close ups (1:2.9);
Canon EF 16-35mm f4.0: I like using this instead of the f2.8 hence it has optical stabilization (f2.8 with speed boaster)
Canon EF 100 mm 2.8 (one dive for some close-ups)
The Canon lenses are paired with Metabones speed booster

BigBlue 5000 lumens were used at second level from highest setting. I have installed the yellowish filters that come with the lights all the times. The lights were used in closeups to medium shots (most of the times). This is my first time shooting with lights. I found them very useful for retaining good colors and helping the camera achieve a better dynamic range while using Slog3. The lights also made my editing quite easier and faster.

Sealux Housing:
SeaLux in general makes good quality housings at good price point. I had my first EX1 housing from them before. Hence the Sony EX1 has a built in lens and was mostly used used in autofocus mode, my previous sealux housing experience was good.
The FS7 housing was made for changeable lenses and I never had a housing for such exchangeable lenses before to bench mark. However, I found the whole process of setting up lenses and changing them is counter intuitive. Once this difficult setup is done the housing is ergonomic and usability is fine. Both the focus and the zoom nobs feel and operate well underwater.
I do not want to sound harsh on the company, but honestly the housing that I received seemed to me like a prototype more than a finished product. I had to modify the lens gear to make it fit my initial lens setup - Canon 16-35mm f2.8 LII.
I also had to make a new smaller gear inside the housing replacing the existing one to ensure enough distance between the focus and the zoom ring gear on the lens (2-3mm).
The lens focus rings is made of good stiff plastic which is glued on a plastic barrel sleeve. It is not easy to fit the lens in the barrel due to protrusion on the lens. I have seen other companies do it more intuitively. If you are not going to have to remove it frequently, it is a workable solution.
One big disappointment for me was the removal of the electronic controls from the housing despite the fact that it was advertised when I made my purchase. Sealux responded back to me saying it was not useful to conclude. Actually sony LANC is quite a handy control as a back up in case one of the essential manual controls such get jammed (such as the record button). In addition, it ensures that the housing can be future proof. My friend Sultan, had a sealux housing that he used for 3 different sony cameras with similar size over many years.
One more little source of annoyance, is the lack of feedback on the record button. There is no tactile feedback when pressed. I missed important shots because of that. The small 3" screen on the FS7 doesn't help seasoned divers :( much as well in this regard. If you guys are still contemplating to buy the housing, I can do a little video showing how the setup is put together.

On the positive side, once the housing is setup and balanced with a bit of lead. It is quite stable and functional in the water.

Finally, If you are a professional who is paid for such a setup and looking to house the FS7, it might be worth the investment. (Note about FS7 mark II - the new lens locking mechanism might not work with the housing. Please check with Sealux)

I hope that sealux take such constructive criticism positively. We need them to improve and flourish in one of the smallest economies which is meant to serve the biggest part of planet earth: the oceans :)

#381391 Sony PXW-FS7 underwater

Posted by thani on 10 February 2017 - 04:50 AM

Hi guys,

Finally I had time to finish the video.

#380308 Sony PXW-FS7 underwater

Posted by thani on 06 January 2017 - 09:15 AM

Hi Ante,

I am currently experimenting with the FS7 in a Sealux housing and have done a recent trip with it. I will posting a video in a week or so.
I have used the Sealux Sony EX1 housing before and the build quality was good. Altough the FS7 housing is a good value for money, I have some reservations. I will be shedding light on the usability of the housing later.
The camera itself is good especially if used with lights and Slog3 hence you can edit the footage easily. But the whole setup is quite heavy to move around on land. I was using a wheelbarrow to carry it around on the island. In the water it is quite balanced (it needs extra weight ~ 2kg to balance with an 8 inch dome). I'll post my feedback on the setup after posting the video. My advise is not to rush and invest in such an expensive setup hence this year new cameras are coming to market with hopefully a 422 10 bit internal recording such as the GH5.

#363545 18 Years - A Story of a Broken Curse

Posted by thani on 24 July 2015 - 10:47 AM

Gorgeous. And the divers in some of the shots gave perspective on the shear size of those beautiful mantas.

#353659 Help! I'm going blind

Posted by thani on 24 October 2014 - 02:21 AM

Hi guys,

I was thinking of the same prescriptiondivemask but then I run into the disposal contact lenses for close reading. You just wear one in one eye off course :) and it takes a bit adjusting to it.
It works and now I always wear one when shooting. As a refrence I use it with Blackmagic 2.5k & 4k cameras.

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#342745 Go Pro 3 or 3+ Mod

Posted by thani on 02 February 2014 - 07:09 PM


When doing aerial can you still have a view/monitor what your camera is shooting so you can compose your shots properly or is it just a wild guess?

;) I know this is an underwater forum but your topic is quite an interesting one :)

Actually sometime I believe having an areal shot of some dive sites like rock formations and/or small islands can make a good story telling for your underwater video.

#335980 GH3 Sample Video

Posted by thani on 19 August 2013 - 06:50 AM

Nice footage. Very promising setup.
Thank you Chris for sharing
Did you use the continuous autofocus in GH3? How did it behave? Was it helpful in all cases macro/wide?
I know that you used lights but did you use Manual white balance and/or red filter?
  • Cp likes this

#324008 Bokeh???

Posted by thani on 07 January 2013 - 01:11 PM

Hi Okuma,

These shots were not planned in advanced for pokeh effect.The camer used was Sony FS700.
And lens used was Carl Zeiss 24/1.8 in auto iris, auto focus mode hence the housing has no manual controls for such functions.
This why it was left to the lens, the lighting and the composition.

This is the link:
I hope this can help Posted Image


#318501 Sony NEX-FS700 housing project

Posted by thani on 16 October 2012 - 09:59 AM

It felt just like we were seeing Jacques Mayol in The Big Blue, surfacing with the world record.

The "Okayyy" shout comes from the guy who made alot of effort into the manufacturing processes. Posted Image

The Ninja housing could be a fraction of the size/weight if it was machined out of a solid block of aluminium or delrin to fit the shape of the Ninja. Also, having a separate cable linked external monitor would allow better ergonomics and positioning for viewing at different angles (not to mention transportability).

Transportability: Is not an issue hence you can unscrew the monitor housing from the main housing.
Ergonomically: I agree that it might be difficult to use in certain setuations.
Size: Width-wise, you can not make it less wider hence it is a tight fit. And the HDMI out is on the side of the monitor, does not help a lot.

Guys remember that we do not have the tools to do it better.

Come on guys, give us a break. We are a bunch of hobbyists executing this challenging project.
Show some support plz Posted Image

#317839 Sony NEX-FS700 housing project

Posted by thani on 04 October 2012 - 06:40 PM

Here is the second major milestone in this project: Inventing a Ninja II housing.
I hope the attach photo is shown correctly as I am posting through iPad (iOS 6).

The Ninja II which uses HDMI is working beautifully with FS700.


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