i-PRO WVLZA61/2S 1/3 Varifocal Zoom Lens

We've worked with i-PRO CCD camera systems across retail surveillance, transit stations, and warehouse inventory applications for over a decade. The WVLZA61/2S varifocal lens is a mature optics platform that does one thing exceptionally well: it lets you dial in the magnification you need without inventory management headaches. In practice, that translates to faster commissioning cycles — you install one lens, adjust zoom to frame the entry portal or cash-wrap, and move on. No second trip for a different focal length, no six-week lead time on specialty glass. The interline transfer CCD and 1/3-inch form factor also mean solid low-light performance when paired with a camera that has decent quantum efficiency; i-PRO's Lightfinder-era bodies (WV-CP290 era) paired with this lens deliver usable 0.5-lux monochrome footage in shipping docks and back-of-house areas. That's valuable in facilities with minimal supplementary IR. The real differentiator versus fixed optics is flexibility during handover: once your integrator has the system running, you can ask them to zoom tighter on the loading dock or pull back to show the fence line — they adjust the lens, refocus, and you avoid a service call. Compared to modern IP PTZ cameras with motorized zoom, this is lower resolution and lower bitrate — a trade-off if your compliance or forensic requirements demand HD or 4K. But for long-term analog-to-IP migration strategies where you're squeezing life out of legacy CCD infrastructure, varifocal zoom is the cost-effective way to extend coverage flexibility.

Technical Highlights:

• 1/3-Inch Interline Transfer CCD Optics Mount: The WVLZA61/2S is optically designed for the 1/3-inch CCD pickup element — pixel pitch and sensor size are baked into the optics. Mismatched lens-to-sensor combinations (e.g. 1/4-inch lens on 1/3-inch camera) introduce vignetting and aberration; verify your camera specs before ordering.
• Varifocal Zoom Adjustment Mechanism: Manual focus and zoom rings (typical for analog-era lenses). Requires operator or technician manual adjustment — not motorized or remotely controlled. This is a feature (no power draw, no added complexity) and a constraint (no soft-focus commands over IP or serial control). For PTZ head integration, ensure your pan-tilt drive mechanics accommodate the lens weight and depth profile.
• IR Transmission and Day/Night Compatibility: The lens glass is optimized for both visible (400–700nm) and near-infrared (700–1000nm) pass-through. Paired with a day/night camera (mechanical IR cut filter), the lens supports switchless surveillance — the camera's internal filter rotates in/out, and the lens adjusts exposure automatically. No dedicated monochrome/color mode switching required for low-light operation.
• Thermal Stability (–10°C to +50°C): Varifocal mechanisms are susceptible to focus drift in rapid temperature cycling because the barrel and focusing helicoid expand/contract at different rates. The stated range is continuous operation; verify refocus frequency in seasonal high-variance environments (unheated warehouse entries, exterior kiosks in desert climates). Your technician will need access for periodic refocus checkpoints in those cases.
• Compact Rack-Mount Depth: The 0.39-inch depth is critical for PTZ head space budgets and recessed ceiling trim-ring installations. If your camera is mounted in a low-profile turret or behind a decorative bezel, this lens won't force mechanical redesign. Verify clearance with your specific camera chassis before procurement.

Deployment Considerations:

• Verify your camera model's mechanical lens mount specification and thread size before ordering. i-PRO CCD cameras from the WV-CP and WV-NW series support this lens; confirm your specific camera serial in the compatibility matrix (usually in the camera's qspec or manual).
• Varifocal zoom is a manual, operator-adjustable function — there is no motorized zoom, no remote focus control via IP/serial, and no autofocus. If you need motorized zoom or automated focus adjustment, you will require a PTZ head or a motorized lens unit (separate sku). For fixed-installation low-touch environments, manual zoom is fine; for active surveillance centers with frequent framing adjustments, motorized options are worth the budget premium.
• Pair this lens with a camera body that has IR LED arrays or external IR lighting if you plan low-light operation. The lens is IR-transparent; the camera's low-light sensitivity depends on its sensor spec and available illumination (internal IR or external floodlight). A legacy CCD without built-in IR will produce very dark monochrome footage after dusk without supplementary lighting.
• Installation and focus alignment require precision: misalignment (tilted lens barrel, improper seating on the camera mount) causes soft or blurry imagery across the zoom range. Use a lens alignment jig or have an experienced technician handle the mechanical fit. Do not force the lens onto the camera — if resistance is felt, stop and check the thread pitch and cleanliness.
• Varifocal lenses are sensitive to dust and moisture ingress into the barrel during installation. Keep lens caps on until you are ready to mount; do not leave the lens unmounted in a dusty job site. If installed outdoors without a protective dome, add a UV or clear protective filter (separate sku) to protect the front lens element from weathering and abrasion.

The WVLZA61/2S is a solid fit for integrators managing analog-era CCD surveillance infrastructure and looking to extend coverage flexibility without wholesale system replacement. If your client is consolidating multiple fixed-focal-length cameras at a single location or transitioning a legacy system to hybrid analog/IP architecture, varifocal zoom on the CCD side buys you negotiating room during the IP migration roadmap. For new-build projects, IP PTZ cameras are almost always the better economics and performance choice. For more options and compatibility details, visit the i-PRO catalog.