2004Foro Video Assist and Video Accessories
Construcción y suministro de grifos para asistencia de video en cámaras de película
Tiene 22 años. Es posible que el equipo y los precios hayan cambiado desde entonces.
Lo que encontró el hilo
- Los grifos oculares se pueden construir a partir de una lente de montaje C de 24 mm junto con un extensor para lograr la distancia de enfoque macro requerida de aproximadamente 1 pulgada del elemento frontal.
- La matriz de sensores CCD debe ser posicionada lejos de la lente utilizando el extensor para alcanzar la distancia de enfoque adecuada para el funcionamiento del grifo del ojo.
- Un engranaje mecanizado es necesario para interactuar con el hilo de montaje del ocular, que varía entre modelos de cámara como doble helix en modelos mayores de Arri y triple helix en nuevos.
- Alternative DIY mounting can use aluminum strips attached to the lens secured with hose clamps to the eyepiece assembly after removing the eyecup optics.
- Pre-made tap systems like those from PCI or JAR manufacturers are commercially available but designed for specific sensor sizes like 2/3 inch cameras.
- Optical adapters can be sourced through scientific supply catalogs like Edmund to convert between different CCD sensor sizes on existing tap systems.
- Rental houses may supply stainless steel flanges from various camera models that can be adapted for eyepiece tap construction, though this approach remains expensive.
- Used eyepiece tap systems appear on secondary markets with significant cost savings compared to new equipment.
- Building a functional eyepiece tap requires investment in optics, metalworking tools, and precision alignment, with success not guaranteed.
Depende de
- This discussion is from 2004 and reflects equipment and pricing of that era.
- The DIY construction method described requires significant metalworking and optical expertise.
- Compatibility varies by camera model and CCD sensor size, requiring case-by-case adaptation.
- No consensus reached on whether DIY construction represents genuine cost savings versus commercial options.
- Specific pricing and product availability mentioned are historical and likely outdated.