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Author Topic: Snorkel Lenses & the TD
Dennis
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Posts: 6
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Post Snorkel Lenses & the TD
on: June 14, 2012, 01:49
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In our early experience with the TD, we did a job using a snorkel lens.

It was particularly challenging and I will leave it to Marc to elaborate on.

Has anyone had similar experience and is the TD's software up to the challenge?

What workarounds have you found to achieve various shots with the TD / Snorkel or is it worth avoiding that combination altogether ?

Bogdan
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Posts: 1
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Post Re: Snorkel Lenses & the TD
on: July 2, 2012, 13:54
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Hey Dennis, sorry we couldn't meet up while you were in town its been super crazy here. I have to say some of my most successful Technodolly jobs have been with snorkel lenses doing "buck" work. It takes all the awkwardness of operating with a snorkel lens and throws it out the window! Plus I can tell you with great certainty there is nothing out there that can get as close and be as precise when it comes to car interiors and you don't have to lay any track!

Marc
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Posts: 2
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Post Re: Snorkel Lenses & the TD
on: July 3, 2012, 21:04
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The problem we had with the snorkel lens on the TD was in relation to a Macro job where the camera needed to fly around a burger and other ingredients.
Because of the large offset between the snorkel lens and the nodal point of the crane (or crane origin point)the resultant move did not relate well to what was desired. In one example the director wanted to drift onto a top shot looking down on a burger then track back and jib down to end up looking up at the burger from the front all the while keeping it in frame. We duly sampled 3 keyframes beginning middle and end but because the lens was actually a couple of feet below the head tilting up caused the lens to move forward in up when it was supposed to be moving backward and down. The work around fix was to sample many keyframes at a precise distance from the point we wished to move around. We sampled 15 or so in the end each time having to carefully maneuver the lens and crane into position. It was very time consuming and the resulting move was practically impossible to adjust. As i understand it the problem could have been solved if there had been a way of including large nodal offsets into the programming. The solution Jan has suggested and one i believe he is working on is the development of a Point Of Interest Keyframe that the move can be created in relation to. The present thinking is to sample two POI frames and the intersection of the optical center of these two frames creates a single POI frame around which a move or part of a move can be constructed.

Les
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Posts: 2
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Post Re: Snorkel Lenses & the TD
on: July 5, 2012, 10:24
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Sounds to me like the conversation with Jan about real-time nodal offsets should be stepped up. This functionality is standard with most motion control systems. I believe Jan was working on this, but more and more jobs are going to come up needing the capability of placing the rig in a virtual offset to the physical nodal point.

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