2011Forum Cameras (Film/Video/HD)
Mit servogesteuertem Zoom und Fokus auf Canon DSLRs für Live-Videoarbeit
15 Jahre alt. Geräte und Preise können sich seitdem geändert haben.
Was die Diskussion ergab
- Canon DSLRs haben keine integrierten Zoom-Servosteuerungen im Videostil, die professionelle Rundfunkkameras haben
- Servo-Zoom-Lösungen für Canon DSLRs sind extrem begrenzt und teuer, mit Kino-Mount-Optionen kosten Tausende von Dollar
- Stand-Objektive zeigen Fokus-Tracking-Probleme während Zoom-Operationen, einschließlich Objektiv Kriechen und Unfähigkeit, den Fokus im gesamten Zoombereich zu halten
- Tokina and Canon zoom lenses with mechanical manual focus modes can work with external servo controllers like Microforce or gimbal-mounted controllers
- Stopping down aperture to around F4 can improve focus consistency with still lenses during zoom operations
- Some still lenses like the Canon 70-200mm f/2.8 and 16-35mm f/2.8 have been used successfully on video shoots despite not being parfocal
- Mechanical manual focus lenses with hard stops are more compatible with remote lens control systems than modern autofocus drive-by-wire designs
Hängt ab von
- Solutions described are workarounds rather than integrated servo systems; none match the performance of professional ENG lens setups
- Affordable servo zoom options under $2000 were not available at the time of discussion
- Compatibility between specific lens models and servo controllers requires matching mechanical specifications
- Panasonic and Sony were developing servo-controlled lenses but used LANC control protocols incompatible with Canon systems
- Focus tracking reliability with still lenses varies depending on specific lens model and shooting conditions
- Most current Tokina zooms available at discussion time were for crop-sensor cameras only