Jump to content


ScubaBob

Member Since 04 Aug 2004
Offline Last Active Today, 07:33 PM
-----

Posts I've Made

In Topic: Red gel on underwater video light

26 February 2015 - 02:51 PM

Anyone have any experience shooting with red gel on video lights during night dives? The idea being of course to avoid annoying wildlife and limit those pesky larvae that like the lights so much. Any advice on specific gels to use will be gratefully accepted.

 

This topic came up here before (in 2014 I think) and I was also interested in this - someone said they were going to do a test. I know on land at least, the closest I can get to a correct white balance with red light is somewhere in the yellow spectrum. I'm thinking this might also require some kind of filter on your lens as well to get back to white. Not sure if this will slow things down too much or push ISO to high..


In Topic: GH4 - Nauticam Macro Lens/Port Thoughts

18 February 2015 - 10:25 PM

I stopped doing it (AF) with the 12-50. Manual focus mode, and I use back-button focus to get close, and use the peaking and repositioning the camera as needed to fine tune.


Sent from my iPhone using Tapatalk

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

18 February 2015 - 07:26 PM

Yeah, I've definitely found that the worse the viz, the worse the noise on the GH4. I think it you have less than 15'/4 meters, it's a macro day!


In Topic: Panasonic GH4 might get a V-log profile?

18 February 2015 - 03:34 PM

This is exactly what I have experienced however once you have a filter there is no benefit whatsoever performing custom white balance auto works just fine.

Not might experience at all. To qualify that, I'm talking about when doing ambient light shots (even with fill light) - which is really the only reason you need the red filter. AWB, even with filters, is hit or miss on every camera I've filmed with. There are techniques, such as turning the camera on while pointing at sand, that can produce fairly decent results, but it's still a crap shoot IMO. Those techniques worked for my old PC100, and I've used it for the GoPro, but for camera's where I can MWB I will go that route every time (even if I have to do it for every shot) - even with a filter.


In Topic: GH4 - Nauticam Macro Lens/Port Thoughts

18 February 2015 - 01:56 PM

Out of interest seeing that the pz14-42 has focus at start of shot and you can refocus why would you need manual focus? Looks like autofocus works wonder for me

 

Ok, probably a 1000 different scenarios I can think of :) For example, you have focus locked on the eye of blenny, which is perfectly in your lower right power point. The fish moves and the eye is now in the lower left power point, still a great shot. If the gods are on your side and you are in focus tracking mode you may be ok. But they aren't, so you're not and the eye is out of focus. You can either re-establish focus and reframe your shot hoping the blenny doesn't move, or use the manual focus knob slightly and using peaking, get yourself back in business.