Fujinon UA46x9.5 – Lęšiai

The UA46x9.5 is a standard B4 mount lens compatible with all 2/3" broadcast cameras (Sony ELC/HSC, Panasonic AK, Grass Valley Infinit, Canon CINE, and legacy studio chains). Compatibility is mechanical and optical—no firmware dependency exists. Verify your camera's back-focus distance and that your CCU supports the lens's control protocol if you require motorized iris or focus integration. Manual lens operation requires no electronic interface; motorized accessories (servo control boards) must be specified at purchase.

At full zoom (437mm), f/3.9 is a significant light loss compared to the f/2.0 wide end—roughly 2 stops. For ENG in dim interiors or evening shoots, you'll rely on ISO gain or auxiliary lighting. Depth-of-field increases at 437mm regardless of aperture, limiting selective focus. The 2x extender compounds this (f/7.8 equivalent at 874mm). Confirm your camera's native ISO performance and whether your production workflow accepts digital gain or requires ND filtration strategy at the wide end instead.

Minimum object distance is 2.8m across the zoom range—this is fixed at the wide end (9.5mm). At 437mm, 2.8m translates to a significantly magnified image, suitable for detail work. The 2x manual extender does not alter minimum focus distance. For tight interior ENG or run-and-gun close-ups, verify this limitation in your shot list. Macro focusing requires external close-focus attachments (not standard with this lens); consult Fujinon accessories for options if your brief demands closer work.

OS-TECH (optical shift) stabilization is fixed and active whenever the lens is mounted—it cannot be disabled. It compensates for operator hand tremor in ENG handheld work, particularly effective above 100mm focal length where magnification amplifies shake. On tripod/jib rigs, stabilization remains engaged and does not interfere with smooth pans; it corrects only residual vibration. Performance degrades in extreme motion (running, vehicle-mounted). Confirm your camera body's internal stabilization (if present) is toggled off to avoid double-correction artifacts and potential oscillation.

Nine blades produce smooth, near-stepless iris transitions essential for live OB van work and studio telecine. Blade count directly reduces luminance aliasing and iris "breathing" during exposure ramps. The lens supports manual iris (mechanical ring) and motorized servo control via auxiliary boards—confirm whether your control chain uses Fujinon's standard lens control protocol or legacy triax/fiber systems. Integrated CCUs (Sony, Panasonic) typically support plug-and-play servo; standalone rigs require external motor controllers. Verify your specific camera's remote iris capability before assuming motorized operation.

B4 mount is mechanical and reversible; lens removal and reinstallation takes 2–3 minutes on properly aligned rigs. Back-focus alignment and optical adjustment must be verified after swap—use a resolution chart or confirm with your TD before going live. B4 adoption is industry standard for 2/3" broadcast; adapters exist for legacy 1" cameras (mount only; optical performance degrades). Future UHD migration typically involves native 2/3" camera upgrades rather than format conversion. Plan lens investment around your camera roadmap; this lens remains current for 2/3" broadcast for the foreseeable term.

The UA46x9.5 weighs 1.98kg (without hood). A typical 2/3" shoulder camera body weighs 3.5–4.5kg; add viewfinder, microphone, and battery, and total rig mass reaches 6–7kg. Professional ENG shoulder rigs are rated 4–8kg; this lens falls within standard ballast. Balance depends on lens position relative to the shoulder pad—closer mounting (near the CCU) distributes weight better for handheld work. Verify your support arm's rated capacity and center-of-gravity adjustment. For extended 437mm telephoto shooting, counterbalance with rear weights or use a jib; sustained handheld zoom work at full extension causes operator fatigue.

The UA46x9.5 is a passive optical device—no firmware or electronics updates exist. The 2x manual extender is a mechanical accessory, not field-upgradeable. Optical performance and mount tolerances do not change. When evaluating used units, inspect lens elements for fungus, haze, or internal dust (common in humid storage), test iris blade movement smoothly across the full range, and confirm focus helicoid smoothness. OS-TECH stabilization is mechanical; worn bearings may reduce effectiveness but are not user-serviceable. Request optical inspection records from the reseller; external cosmetic wear does not affect performance.

The UA46x9.5 requires no internal maintenance—it is sealed optics with no user-serviceable parts. Budget for front/rear lens caps, UV or IR-cut protective filters, and a professional lens cloth and blower brush (standard kit). The 9-blade iris mechanism is internal and maintenance-free. In humid environments, store with silica gel; dust, salt spray, and sand ingress are the primary wear vectors. The 2x extender has no mechanical wear-outs. Service is limited to optical cleaning and external cosmetic care. Fujinon repair centers handle severe damage; plan spares (protective filters, caps, hood) rather than spare optics for a typical 2–3 camera ENG fleet.

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