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mmccue

Member Since 13 Oct 2012
Offline Last Active Jan 11 2014 06:14 PM
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Posts I've Made

In Topic: Sony FS100 white balance at depth

03 January 2014 - 09:43 PM

I just returned from a trip to Palau, and I was able to experiment a bit more with the FS100/Genesis setup. I think that at least a big part of the color reproduction issues, as well as the rings and halo effects, are due to problems within the 16mm pancake lens. I left that lens in my bag this trip, and decided to try the stock 18-55mm e mount lens with an equinox blue water color correction filter. I was very happy with the results. I'm now convinced that with a decent lens, the right filer, a few tweaks to the picture profile, and adding a housing for my Ninja2 deck, it is possible to consistantly get very good quality images with this rig.

 

I just posted a few unedited clips on vimeo....

 

I tried to pick clips with more color, so these are not neccesarily my best shots. All of the clips I've posted were shot with natural light, at depths between 40 and 80 feet, with the 18-55mm lens, and equinox filter. I did manual white balance on a white slate with exsisting light at around 20 feet on my way down (with no further adjustments), or in some cases I was able to get a decent manual white balance using my 2 sola 1200 lights on the white slate, and then switching the lights off. I set the gain to 9db on some of the deeper shots, which doesn't seem to have any noticeable ill effects (to me anyway). I also saw no signs of the halos or rings. Proper exposure is definitely neccesary, although I personally like the look of the slightly underexposed shots. There seems to be planty of detail left, so I'm sure bumping them up in post a bit will result in a good look.

 

I hope there are still others that still haven't given up on this camera for underwater use. It will be a while before I can afford another set up, and my next camera will undoubtably be a 4k model. Please keep posting your experiences.

 

Mike McCue


In Topic: Selling Sony Z1U with Light and Motion Bluefin Housing - Only $2500 - Re...

14 August 2013 - 08:04 PM

Update...the camera has sold, but I still have the housing. Please let me know if you are interested in the housing alone. The ports are in excellent shape (no scratches).


In Topic: Sony FS100 white balance at depth

03 May 2013 - 06:34 PM

Here are some samples from a recent dive showing the halo/banding effect that has been mentioned. This was shooting without a filter. I manually white balanced on a grey slate as I was descending at around 25 feet. I don't recall the temperature that popped up, but it looked good at that depth. I then descended to about 50 feet without touching the white balance. I've used this method with other sony cameras (EX1R and Z1) and while it's not ideal (images are fairly blue), the results are usually acceptable and can easily be corrected in post. This was shot with a 1080/60p PS setting, 0 db Gain, and everything on manual. The effect seems worst in darker areas at F stops of 16 to 13. You can see them come and go in the video clip as the image becomes more exposed and then darker again. You'll notice me adjust the iris manually from F16 to F13 aat around 15 seconds int0 the video clip.

 Attached File  FS100 Banding 1.jpg   34.81KB   54 downloads

I originally thought the banding was some sort of reflection inside the dome port, as I have had issues with that as well. Silver is a bad color choice for a lens. It's interesting to hear that the effect has been seen topside, as mentioned on this thread about the FS700.
 
http://wetpixel.com/...nce#entry330239
 
Under what conditions are you recreating the halo/banding effect topside Simon? Seems like it would be easier to experiment on the dry side if that's possible.
 
Mike


In Topic: Sony FS100 white balance at depth

03 May 2013 - 05:22 PM

Looks like another option is on the way. If Simon is right and the issue in camera, or something between the camera and the lens, the superior codec might not solve anything. Has anyone been able to experiement with different lenses or external storage devices underwater? I have a Ninja 2, but haven't been able to get it in the water yet. Works great topside. My only dissapointment is that I'm unable to record different frame rates with it.

 

http://wetpixel.com/...-atomos-ninja-2

 

Mike


In Topic: Sony FS100 white balance at depth

07 February 2013 - 02:49 PM

It sounds like Amphibico is up in the air as to whether they'll release a housing for the Ninja2 or not. I was refered to Dive and See who does have a housing availabale currently.

http://www.diveandse...ater-monitors/1

I have the Ninja 2 deck already, and I'll be ordering the housing soon. Hopefully using the better codec will help resolve these issues.

Mike