2012Forum Steadi-Newbies
Équilibrer une caméra légère avec un microphone sur un Merlin steadicam produit un mouvement de pendule
Il y a 14 ans. Le matériel et les prix ont peut-être changé depuis.
Ce que le fil a révélé
- L'ajout d'un microphone à une installation de caméra légère jusqu'alors stable peut causer des oscillations excessives du pendule et une sensibilité aux petites perturbations.
- Les plates-formes plus légères à masse inférieure sont intrinsèquement plus sensibles aux forces extérieures comme le vent et nécessitent un contrôle plus actif de l'opérateur par le guidage des doigts sur le gimbal.
- Making a rig more bottom-heavy by adding counterweight reduces sensitivity and pendulum effects but increases drop time, while a lighter bottom-heavy configuration is more responsive but requires greater operator skill.
- Adding weight to the stage up to the manufacturer's maximum recommendation increases inertia and improves stability with less pendulum effect, even if it means adding counterbalance weights to maintain acceptable drop times.
- Operating a lightweight steadicam successfully requires continuous active compensation through the non-flying hand rather than relying on passive balance alone.
- The drop test alone cannot reveal all tuning issues; a rig that performs well in drop tests may still exhibit problematic behavior during actual operation or static holds.
Dépend de
- The issue is specific to very light camera setups with added accessories, where mass is minimal.
- Resolution of the sensitivity-versus-responsiveness tradeoff depends on shooting conditions and operator skill level.
- The discussion does not include specific numerical parameters or detailed tuning steps.
- Outdoor conditions like wind create additional challenges beyond what indoor testing reveals.
- The configuration remains fundamentally limited by the Merlin's design for lightweight cameras compared to full-size steadicams.