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Member Since 04 Jul 2009
Offline Last Active Sep 12 2015 06:09 PM

Posts I've Made

In Topic: News: Sony A7S II (Yep another A7!)

12 September 2015 - 03:46 PM

A FF with amazing low-light capabilities, full sensor readout, internal 4K recording, and 5-axis IS, what an incredible tool this camera will be for under and above water videos.


Improving both NEX-5N and 5R manual white balance is as simple as adding a UW filter, most likely this is the case for the A7S2 also if its MWB has not been improved from the original A7S.

In Topic: Annoying Final Cut Pro Stutter

22 August 2015 - 05:13 PM

Try adding a short transition between clips to see at which duration the problem goes away. (or not)

In Topic: Sony a7s and MWB

22 August 2015 - 04:30 PM

White-balance RAW tests I did show a red filter is needed to get accurate MWB for both Sony 5R and 5N under more than 9m/30ft of water. This may be true for A7S also.

Manual WB without filter:
@ 12m/40ft requires 12000K and +150 Magenta
12000K is outside 5R/5N's 9900K maximum color-temperature range which produces an error message. I think +150 Magenta is also outside the camera hue range.

MWB with an Equinox red filter:
@ 12m/40ft requires 6400K and +150 Magenta
Even though 6400K is inside 5R/5N's color-temperature range, I think +150 Magenta is just outside the hue range, resulting in an error message. However, MWB produces very good colors.

MWB with an Equinox red filter:
@ 9m/30ft requires 4600K and +75 Magenta
Both color temperature and hue are within the camera MWB range so no error message.

BTW, shooting AWB with a red filter, NEX-5R and 5N produce strong green cast in backlit situations. Shooting MWB definitely prevents the drastic color shift, which = less headache in post.

In Topic: 4K: Current Pro- and Semi-Pro Underwater Filming Options

22 August 2015 - 03:53 PM

Nauticam NA-A7II Underwater Housing for Sony A7RII.

In Topic: What camera for video?

12 June 2015 - 01:45 AM

What's special about the GoPro 4 Black is that it features 2.7K (2704x1520) 60p, 50p, and 48p video which appear noticeably sharper than 1080p video on 27-inch desktop and 15-inch laptop monitors with 2560x1440 and higher resolution. Of course 60p, 50p, and 48p videos are lifelike smooth when playing back at the the native frame rates and slow motion. A computer that can play 4K 30p smoothly should have no problem with 2.7K 60p.

The slowest shutter speeds for GoPro are 1/fps - 1/60sec 60p, 1/50sec 50p, and 1/48sec 48p.

The camera ISO can be limited to 400, and 1600.

The White Balance can be set to 3000K, 5500K, and 6500K. For underwater, 6500K with a dive filter rated 6-15 meters (20-50 feet) produce good results under ambience light that can be corrected quite easily with NLE.

I'm happy with the Flip Filter System since switching filters and getting rid of the bubbles on the lens are so easy, although I have not tried the Macromate macro solution yet.