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chedden

Member Since 27 Sep 2008
Offline Last Active Jan 05 2013 03:51 PM
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Posts I've Made

In Topic: 3D with dual Sony CX550V camcorders (and underwater housing)

21 August 2012 - 06:33 AM

A couple of additional comments on the Z10000 (which I have not used)and then I'll shut up until I have something to show. Although contrary to earlier reports, Helmut and Werner's movie was shot with this camera, rather than a 2-camera rig. Unfortunately the camera uses 1/4" sensors and there appears to be no editing support as yet. Nevertheless, for underwater video, as is evident from the trailer (and the disc), this is a good option, especially if you are mainly interested in simple post. For anyone considering this (the price is certainly right), the B&H website has a few good reviews, both pro and con.

In Topic: 3D with dual Sony CX550V camcorders (and underwater housing)

20 August 2012 - 08:21 PM

Hmm. Okay my apology. Apparently Helmut used a different housing by the same company for that trailer, but he and Werner do use (and sell) the DuoDive and have used it for their other productions. The principle is the same, and my remarks are just as appropo. BTW, the best way to view that trailer is with NVIDIA 3D Vision (monitor, emitter, and glasses), but you need to access YouTube with Firefox to see it that way.

In Topic: 3D with dual Sony CX550V camcorders (and underwater housing)

20 August 2012 - 06:34 PM

David,

I wanted to reply to your statement that unless I agree with you that genlocked cameras are necessary for anything except tinkering, there is "not much discussion to be had here," but I have been busy with other matters. My point is that perhaps the question of how important it is to only use genlocked cameras is a discussion worth having, and that to suggest that you should start a new thread on that topic rather than cutting off any further discussion of the DuoDive system. Genlocking cameras is certainly not necessary. For it to make any differenc in the overall workflow, the entire postproduction system would need to be genlocked, not just the cameras. Using two cameras allows you to have the full resolution avalable for the chip, not just half as with the combo systems you mention and it allows for the possiblity of full resolution 2D versions to be made directly from one of the full resolution video streams. What is necessary, however, is frame synchronization. To do that some people use a clapper board, or just bring their hands together so that the same frame on each video stream can be locked by the postproduction software (3rd party hacking, to use your terminology). It is also rather easy just to find the two frames that are identical by looking at the two video streams in software. For an example of the use of the DuoDive housing in professional production (not just tinkering), please have a look at Helmut Goerlitz's 49 minute Blu-ray film "The Art of Diving 3D." The trailer is available at

In Topic: 3D with dual Sony CX550V camcorders (and underwater housing)

31 July 2012 - 06:35 AM

My understanding is that THIS thread is about Sony consumer camcorders in the DuoDive housing. I suppose it is really up to the forum moderator to determine the scope of discussion within each thread, but if you want to broaden the discussion within this thread to include ground-breaking research and future technologies, here is something else that might be of interest to forum readers, and perhaps more relevant than the Lytro camera (which is not actually a video camera): http://www.stereosco...plays&Itemid=60

You'll need to past the link into your browser's address field.

In Topic: 3D with dual Sony CX550V camcorders (and underwater housing)

30 July 2012 - 09:56 PM

David,

Lytro sounds interesting, but I'm not sure how it relates to this topic (3D with dual Sony CX550V camcorders and underwater housing).

Your actual point appears to be that single 3D camcorder systems are superior to dual camcorder systems, so don't waste your time tinkering with dual systems like the DuoDive. That is surely not the case! Apparently your opinion is based entirely on experience with the single unit systems you mention enclosed in some unnamed underwater housing(s).

While you are entitled to your opinion, the facts suggest otherwise. Most professional systems are dual systems. There are more reasons than synchronization to consider. Many believe that dual systems offer greater flexibility, control, and, especially, image quality. I shoot very long scenes using two Sony HXR-MC50 camcorders in the DuoDive housing -- up to an hour or more without a break -- and find that the results are quite stunning. With appropriate shooting technique and careful post production grooming (including frame-specific synching), muxing, converging, and keyframing in the nonlinear editor, sync drift is really a non-issue. If it occurs, it can be handled like any other post production variable. Surely you don't belive that all post production image and sound adjustments in digital photography and videography are "third party electronics hack[s]."

More critical are considerations specific to 3D composition. By avoiding window violations, optimizing positive and negative parallax, etc., audience perception can be enhanced and discomfort eliminated.

While the question of single or double systems is worth having, it was not my intention to engage in that debate with my contribution to this specific discussion thread.