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madtom

Member Since 02 Oct 2011
Offline Last Active Feb 24 2012 08:13 PM
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Posts I've Made

In Topic: Too Much Light?

23 February 2012 - 09:22 PM

I have that camera (CX550) in a BF housing and it over exposes badly compared to other Sonys I have had.
Best results I find when shooting auto is to set the Auto Exposure (AE) shift to -3 though occassionally I will still need to set the exposure to manual and crank it down till it looks good in my monitor.
It also is a little too warm for my tastes tending to over boost the reds so I have also adjusted my White Balance (WB) shift to -2 or 3 depending.
I will usually do a manual WB before recording.
On the plus side, this probably has the best auto focus of any I've used though it may "seek" (blur) in lower contrast subjects as most do.
Setting manual focus is best but for close subjects it is amazing how well the auto focus works.
Other posts cover setting the manual focus.
Hope that helps.
You can get very nice results with this camera but have to practice a lot to find what works best.
John



Thanks for the reply. I will try the Auto Exposure as you suggest. Will a neutral density filter help? In addition to having to much light, there's also a strobe like effect from the light refracting through waves and off the bottom.

In Topic: Too Much Light?

14 February 2012 - 10:20 AM

You don't say if you are using lights at all, and if so, it appears that in a couple feet of water they are not really necessary. However, that you are getting reflections off the fish leads me to believe that you are shooting down on them. I could be wrong on this but if I am correct, then try to get somewhat lower than the fish themselves and film them shooting slightly up. This applies to filming all marine life regardless of depth. When you shoot down on a subject it tends to flatten them out while shooting slightly up will bring out the fish's character and will produce a better composition for your video. This positioning should also help you avoid those unwanted reflections, though at only 1 feet depth, they might not be completely avoidable.
Also, since you are filming in Auto focus, which I strongly advise against, the iris might be fooled by the reflections into going in and out of focus. Practice filming in manual focus only. My 2cents
Steve




Thanks for the reply, I will try shooting in manual.

Shooting at an upward angle isn't always possible at this depth, as I'm often struggling just to get the lens underwater. The auto focus on the cx550 is pretty good, but if I'm hearing correctly, the reflecting light is playing havoc with the auto focus ability to lock on something? Makes sense.

In Topic: Newbie Must Read: What new system did you just buy?

02 October 2011 - 08:46 AM

Hi, I'm a newbie who dabbles in U/W video to document freshwater fish behavior. I'm using a sony cx550 w/ sony spk housing and only film at snorkeling depths.