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Overview
The Nikon SMZ25 and SMZ18 are high-performance research stereo microscopes designed for unparalleled flexibility across macro to micro imaging. The SMZ25 offers a world-leading 25:1 zoom ratio, while the SMZ18 provides a robust 18:1 zoom range, enabling users to examine large specimens at low magnification and infinitely zoom into fine details without changing the optical path. Both models leverage Nikon’s Perfect Zoom System, which dynamically adjusts the distance between the two optical axes during zooming to maximize light intake and maintain high numerical aperture, resulting in crisp, aberration-free imaging throughout the zoom range. These microscopes support modularity: you can choose from motorized or manual zoom, a variety of objectives, and ergonomic or tilting observation tubes. Their design also accommodates advanced imaging applications such as fluorescence, simple polarization, and oblique lighting (OCC), making them ideal for developmental biology, materials research, failure analysis, and other demanding workflows. The SMZ25 includes a remote controller for zoom and brightness control, while the SMZ18 keeps things simpler with manual operation — both deliver excellent optical quality, high resolution, and broad adaptability for your microscopy needs.
Specifications
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Optical System
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Parallel-optics (zoom type) with apochromatic design
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Zoom / Magnification
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SMZ25: 0.63 × to 15.75 × zoom range (25:1 ratio)
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SMZ18: 0.75 × to 13.5 × zoom range (18:1 ratio)
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SMZ25 total magnification (with 10× eyepiece): ~3.15× – 315× (depends on objective)
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SMZ18 total magnification (with 10× eyepiece): ~3.75× – 270× (depends on objective)
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Aperture Diaphragm
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Built into the zoom body
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Objectives (NA and Working Distance)
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0.5×: NA ≈ 0.078, WD ≈ 71 mm (SMZ25) / 0.075, 71 mm (SMZ18)
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1.0×: NA ≈ 0.156, WD ≈ 60 mm (SMZ25) / 0.15, 60 mm (SMZ18)
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1.6×: NA ≈ 0.25, WD ≈ 30 mm (SMZ25) / 0.24, 30 mm (SMZ18)
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2.0×: NA ≈ 0.312, WD ≈ 20 mm (SMZ25) / 0.30, 20 mm (SMZ18)
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Note: Some objectives have a correction ring to adjust for water depth (0–3 mm)
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Eyepieces
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Options: C-W 10×B (22 mm FOV), 15× (16 mm), 20× (12.5 mm), 30× (7 mm)
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Tubes (Eyepiece / Port Options)
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Tilting trinocular tube (e.g., P2-TERG 100)
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Low-eyepoint trinocular tube (angle options available)
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Focusing Options
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Motorized focus unit (for SMZ25): e.g., P2-MFU
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Manual focus unit: e.g., P2-FU
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Nosepiece
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Intelligent nosepiece option (P2-RNI2) allows two objectives and supports on-axis imaging
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Stand / Base
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Plain base
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LED diascopic base with built-in OCC (oblique coherent contrast) illumination
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Fiber diascopic base
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Illumination / Light Paths
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Episcopic: Coaxial epi illuminator; LED ring illumination; flexible double-arm fiber illuminator
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Diascopic: Bright field with LED; OCC illumination via slide-lever for shadow direction control
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Observation methods supported: Bright Field, Epi-Fluorescence, Simple Polarizing (with P2-POL), Dark Field, Oblique (OCC)
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Epi-Fluorescence Attachment
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Can mount up to 4 filter cubes (motorized or manual cube turret)
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Weight (approximate)
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SMZ25: ~32 kg (with motorized epi-fluorescence, tilting tube, focus unit, etc.)
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SMZ18: ~30 kg (with epi-fluorescence, trinocular, LED base, etc.)
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Power Consumption
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SMZ25: ~30 W (in certain configurations)
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SMZ18: ~10 W (in certain configurations)
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You can find complete, updated details on the manufacturer’s website:
[Visit Nikon official product page]
© 2025 Nikon plc. Used under authorization.
Product information sourced from Nikon Microscopes. All trademarks are the property of their respective owners.
