In the field of infrared imaging, the lens determines how far, how clearly, and how wide a device can see.

    Traditional fixed focal length lenses, however, often force a trade-off: either wide-angle search or telephoto lock-on. Achieving both typically requires multiple devices and multiple lenses working together.

    This MWIR continuous zoom lens from Wh-Clear covers a focal length range of 88mm to 1100mm with a constant F-number of 5.5, optimized for 640×512, 15μm detectors. With just one lens, it handles both "wide-angle search" and "long-range identification" at the same time.

1. 12.5x Continuous Zoom: Seamlessly from "Wide View" to "Long-Range View"

    The most outstanding capability of this lens is its continuous zoom performance.

· Focal length range: 88mm–1100mm

· Zoom ratio: 12.5x

· Wide field of view: 5.5°×4.4°

· Narrow field of view: 0.5°×0.4°

    At the wide end, the 5.5°×4.4° field of view is large enough to cover a broad area, making it ideal for search, early warning, and situational awareness.

    At the narrow end, the 0.5°×0.4° ultra-narrow field of view pulls distant targets close for identification, tracking, and detail confirmation.

    Most importantly, the entire process is continuous zoom — not a two-step switch. From target detection to lock-on, the image never drops out, which is extremely valuable in real-world applications.

2. Constant F5.5: No Image Degradation Even at the 1100mm Telephoto End

    Many telephoto lenses suffer from reduced light throughput at their longest focal length, resulting in darker images and loss of detail.

    This lens maintains a constant F# = 5.5 across the entire zoom range.

    The benefits are straightforward:

· Stable brightness that does not degrade with focal length

· Better signal-to-noise ratio

· Solid long-range target imaging

    For a telephoto lens of this class, achieving a constant aperture says a lot about the quality of the optical design.

3. MWIR Band: Built for Long-Range Detection

    The lens operates in the 3μm–5μm waveband, which falls within the mid-wave infrared atmospheric window.

    This band offers several natural advantages:

· Extremely sensitive to high-temperature targets

· Relatively less affected by water vapor

· Well suited for long-range detection and identification

    In applications such as long-range reconnaissance, target tracking, and coastal defense surveillance, MWIR has long been a proven and reliable choice.

4. Compact and Lightweight: A Long Telephoto Lens That Can Actually Be Deployed

    Many people's first reaction to a 1100mm telephoto infrared lens is: big and heavy.

    But this product has been significantly optimized in terms of structural design:

· Total optical length: 288.6mm

· Optical back focal length: 25.8mm

· Mechanical back clearance: 7.1mm

· Total weight: ≤6500g

    For a long-range infrared lens of this class, this weight control is quite impressive, leaving more integration headroom for airborne, vehicle-mounted, and shipborne platforms.

5. 50m to Infinity: Focusing Flexibility Across the Board

    The focusing range covers 50m to infinity.

    This means it excels not only at long-range observation but also handles mid-to-close-range target confirmation and blind-spot coverage.

    For real-world deployment, this flexibility means a single device can cover a more complete mission profile.

Conclusion

    The Wh-Clear 88–1100mm F5.5 MWIR continuous zoom lens solves the classic conflict in infrared imaging: wide versus far.

    With 12.5x continuous zoom, a constant F5.5 aperture, lightweight design, and wide temperature tolerance, this lens stands out as a compelling choice for infrared reconnaissance, target tracking, coastal defense surveillance, and critical infrastructure protection.

    From wide-area search to long-range lock-on — one lens, all the way.