2004Forum Video Assist and Video Accessories
Construction et approvisionnement de robinets oculaires pour l'assistance vidéo sur les caméras de film
Il y a 22 ans. Le matériel et les prix ont peut-être changé depuis.
Ce que le fil a révélé
- Les robinets des lunettes peuvent être construits à partir d'une lentille de 24mm en C jumelée avec un prolongateur pour atteindre la distance de mise au point macro requise d'environ 1 pouce de l'élément avant.
- Le capteur CCD doit être positionné loin de l'objectif en utilisant le détendeur pour atteindre la bonne distance de mise au point pour le fonctionnement du robinet d'oculaire.
- A machined gear is necessary to interface with the eyepiece mount thread, which varies between camera models such as double helix on older Arri models and triple helix on newer ones.
- 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.
Dépend 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- Specific pricing and product availability mentioned are historical and likely outdated.