Fujinon HZK24-300mm – Lęšiai

The S10 servo drive is factory-integrated and controls focus, iris, and zoom via industry-standard protocols compatible with most broadcast RCPs and CCUs. However, control protocol compatibility (analog vs. digital) depends on your existing infrastructure. Confirm your RCP/CCU supports S10 handshake before integration. External servo extenders may be required for long triax or fibre runs in OB van deployments. Contact Fujinon support with your specific control chain model for compatibility verification.

Both metadata protocols can be encoded in the lens data stream, but decoding depends on recorder/camera support. If your system doesn't support either standard, the lens still functions normally—metadata simply won't be captured. However, loss of lens data means no real-time distortion correction, vignetting compensation, or focus position logging in post. For premium OB or live-to-air work, confirm your camera and recorder support at least one protocol before purchase. Metadata support is a forward-compatibility feature, not a functional requirement.

At 2.95kg the lens sits comfortably within most broadcast pan-tilt heads rated for 3–5kg payloads, typical for ENG and studio remotes. The 114mm front diameter is standard for large-format broadcast optics and accepts industry-stock matte boxes and filters. Weight distribution is balanced due to the rear-heavy PL mount design. Primary constraint: verify your specific head's moment-arm tolerance (distance from pan pivot to lens front). For very long focus runs (>50m triax), consult head manufacturer on servo lag at maximum zoom. PL-to-native adapter compatibility depends on your camera's mount—confirm before integration.

The T2.9–T4.2 aperture swing (1.5 stops) is inherent to zoom design and reflects optical physics at extended focal length. In the 24–207mm sweet zone you maintain T2.9; at 300mm, depth-of-field increases and you lose 1.5 stops of light-gathering. Practical impact: long-lens outdoor sports or drama will require either higher light or faster film stock/ISO. Studio lit work rarely notices the difference. For live OB where white-balance and exposure drift matter, pre-plan lighting rigs to handle T4.2 worst case, particularly for distant subjects. Use the 1.5x expander strategically if you need T2.9 performance at longer reach.

0.8M pitch (0.8mm per rotation) is the Fujinon standard for large-broadcast lenses and matches industry follow-focus motors from Fujinon, Preston, and ARRI. One full rotation yields 0.8mm focus travel—tight control, essential for precision pulls at T2.9. Wireless retrofit (radio follow focus) is compatible; the gear drive is robust and tolerates standard motor torque. Potential issue: confirm your retrofit motor's resolution and backlash specs meet your system's accuracy threshold (typical: ±0.5mm). Avoid undersized motors that stall under resistance. Factory calibration of focus throw (mm-to-REV mapping) is your responsibility post-retrofit.

Nine iris blades provide smooth, near-circular aperture transitions with minimal bokeh artifacts—suitable for critical drama and live broadcast. Ramp speed (iris opening/closing rate) is servo-controlled and typically smooth across the range. Watch point: at T4.2 (300mm), smaller apertures expose blade geometry more noticeably; confirm on test footage if iris micro-ramps are visible on extreme close-ups. Built-in servo iris is reliable but responsive to sudden control input; gentle exposure ramps prevent mechanical shock. For live exposure correction (ND filter-free environments), test iris ramping under your RCP's control curve before air date.

At 270.5mm length and 2.95kg, the HZK24-300mm is slightly forward-heavy by design. On shoulder rigs, expect moderate balance shift compared to shorter primes; test-run with your specific camera and matte box assembly before production. Studio setups with proper lens supports absorb the weight penalty easily. Counterweight adjustment (if your head supports it) is minimal—roughly 0.5–1kg additional rear ballast typical. ENG and OB van remote heads rarely require adjustment. Primary risk: unplanned lens swaps mid-shift; factor time for mechanical re-balance. Always secure both barrel supports on unstable platforms.

The 1.5x expander extends range and nominally maintains resolution, but it's an optical element—expect minor transmission loss (approximately 0.5–1 stop) and potential chromatic aberration edge artifacts on extreme zooms. Practical use: extend reach for distant ENG subjects or tight stadium wide shots where re-positioning is impossible. Not recommended for critical color-graded drama where native 24–300mm is preferable. Expander adds bulk and mechanical complexity. Deploy strategically—leave it off for general studio/OB work, attach for specific long-lens days. Verify optical alignment and transmission with your camera's color science before live deployment.

PL mounts accumulate dust and contact oxidation; inspect mount pins and receptor annually and clean with isopropyl alcohol on a lint-free swab. Servo drive gearing (focus, iris, zoom) is sealed but can benefit from firmware updates (verify availability with Fujinon support). Typical wear items: focus gear teeth, servo motors (rare failure, typically >5 years), and iris blades if mechanical shock occurs. No oil service is needed. Budget annual optical cleaning (internal/external elements) through an authorized service center if heavily used in OB environments. Keep spare PL rear caps and dust covers. Check focus throw calibration annually after extended use. Parts availability through authorized dealers is good for this model.

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