AUC-390A & AUC-390FLED Research Grade Parallel Zoom Stereo Microscopes

Exceptional Optical Performance for Advanced Research & Industrial Inspection

The AUC-390A and AUC-390FLED are premium research-grade stereo microscopes designed for laboratories, universities, life science research, semiconductor inspection, materials science and high-precision industrial applications. Built around an Infinite Parallel Galileo Optical System with a Plan Apochromatic Objective, these microscopes deliver superb image quality, excellent colour fidelity and exceptional resolution across an impressive 18:1 zoom range.

Designed for demanding users, the AUC-390 Series combines outstanding optical performance with ergonomic operation, precision focusing and advanced digital imaging capabilities.

Both models are supplied complete with a 1.0× C-Mount Camera Adapter as standard, allowing quick connection of microscope cameras for image capture, live viewing and documentation.

Key Features

• Infinite Parallel Galileo Optical System
• Premium Plan Apochromatic 1× Objective
• Large 18:1 Zoom Ratio
• Magnification range from 7.5× to 135×
• High-resolution optics with outstanding colour reproduction
• Built-in aperture diaphragm for improved depth of field
• Precision coaxial coarse and fine focusing
• Long 60 mm working distance
• High eye-point widefield eyepieces
• Trinocular head for digital imaging
• 1.0× C-Mount Camera Adapter included
• Modular accessory system
• Available with optional LED fluorescence imaging system

Superior Apochromatic Optics

The premium Plan Apochromatic objective provides exceptional optical correction by bringing multiple wavelengths of light into the same focal plane, producing:

• Outstanding colour accuracy
• Excellent contrast
• High numerical aperture performance
• Sharp edge-to-edge images
• Minimal chromatic aberration
• Exceptional image detail

Ideal for research laboratories, quality control and advanced inspection.

Large 18:1 Zoom Range

The precision zoom system offers continuous magnification from 0.75× to 13.5×, with positive click-stops at commonly used magnifications for repeatable observations.

Combined with the supplied optics this provides: (10x eyepieces and 1x Objective)

• 7.5× to 135× total magnification

The zoom mechanism remains smooth throughout the entire range while maintaining excellent image quality.

Built-In Aperture Diaphragm

The integrated aperture diaphragm allows users to optimise:

• Depth of field
• Contrast
• Resolution
• Image brightness

Providing improved observation of both flat and three-dimensional specimens.

Precision Focusing System

The AUC-390 Series features a robust integrated focusing mechanism offering:

• Coaxial coarse and fine focus controls
• Adjustable focus tension
• 50 mm focusing range
• Fine focus precision of 0.002 mm

Ideal for precision research and inspection work.

Comfortable Ergonomic Design

Designed for extended daily use, the AUC-390 Series includes:

• Ergonomic 20° inclined trinocular viewing head
• Adjustable interpupillary distance (50–76 mm)
• Diopter adjustment
• High eye-point widefield eyepieces
• Smooth zoom controls
• Precision focusing mechanism

These features help minimise operator fatigue during prolonged observation sessions.

Choose the Model That Best Suits Your Application

AUC-390A

The AUC-390A provides exceptional optical performance for laboratories and industrial inspection where brightfield observation is required.

Features include:

• Infinite Parallel Galileo optics
• Plan Apochromatic objective
• LED transmitted illumination
• Precision coarse and fine focusing
• Glass stage insert (180 mm diameter)
• Trinocular camera port
• 1.0× C-Mount Camera Adapter included

Optional Ring Lights or Goosenecks are available 

Perfect for research, quality control and precision inspection.

AUC-390FLED

The AUC-390FLED builds on the capabilities of the AUC-390A by incorporating a powerful LED Epi-Fluorescence System, making it suitable for advanced fluorescence applications.

The fluorescence system includes:

• Six-position fluorescence module turret
• Capacity for up to five fluorescence filter cubes plus one brightfield position
• Includes Blue (B), Green (G), Ultraviolet (U) & Red (R) filter cubes.
• High-performance four-band LED light source
• Adjustable illumination intensity
• Brightfield module included
• Light shading plate
• Quarter-wave (¼λ) plate
• External LED control unit

This provides a versatile platform for fluorescence imaging without the maintenance requirements of traditional mercury lamps.

Additional Fluorescence Filter Options

The fluorescence attachment supports a wide range of applications with available filter sets including:

• FITC
• DAPI
• TRITC

These filter options make the microscope suitable for numerous fluorescence techniques used in biological and biomedical research.

Digital Imaging Ready

Both microscopes are supplied with a 1.0× C-Mount Camera Adapter, allowing connection to compatible digital microscope cameras for:

• Image capture
• Live video
• Measurement
• Reporting
• Documentation
• Teaching and training

Typical Applications

The AUC-390 Series is ideal for:

Life Science

• Biological research
• Live cell imaging
• Cell culture
• IVF laboratories
• Zebrafish research
• Dissection
• Histology
• Medical research
• Chemical analysis

Industrial Inspection

• PCB inspection
• SMT inspection
• Electronics manufacturing
• Semiconductor inspection
• Precision engineering
• Materials science
• Metal inspection
• Component quality control

Laboratory

• Universities
• Research institutes
• Pharmaceutical laboratories
• Clinical laboratories
• Biotechnology laboratories
• Quality assurance laboratories

Specialist Applications

• Gemology
• Jewellery manufacture
• Coin inspection
• Watchmaking
• Precision engineering
• Engraving
• Conservation
• Small component repair
• Electronic PCB inspection

Standard Specification

Optical System

• Infinite Parallel Galileo Optical System
• Plan Apochromatic 1× Objective
• 18:1 zoom ratio
• Zoom range: 0.75×–13.5×

Eyepieces

• High eye-point Plan Widefield 10×/23 mm
• Diopter adjustment

Viewing Head

• 20° inclined trinocular head
• Adjustable interpupillary distance (50–76 mm)

Focus

• Coarse and fine coaxial focusing
• Adjustable focus tension
• 50 mm focusing travel
• Fine focus precision: 0.002 mm

Working Distance

• 60 mm

Camera Port

• Trinocular camera port
• 1.0× C-Mount Camera Adapter included as standard

Illumination

• LED transmitted illumination
• Adjustable brightness

Oblique illumination enables the specimen to be illuminated
from one side only (off-axis) by having the light source titled
or directed from an oblique angle or from the side. Only
diffracted light on a single side is admitted to the objective
and, because of the obliquity of illumination, diffracted light
on the other side misses the objective altogether. As a result,
details in pseudo-relief from an otherwise almost invisible
colorless specimen are than revealed.

Optional Accessories

• 15× Widefield Eyepieces
• 20× Widefield Eyepieces
• LED Ring Light
• Fibre Optic Cold Light Source
• Digital Microscope Cameras
• Additional Fluorescence Filter Cubes
• Image Analysis Software

Why Choose Auckland Scientific?

When you purchase from Auckland Scientific, you're investing in more than just a microscope.

Every AUC-390 Series microscope is backed by:

• 3-Year Auckland Scientific Warranty
• Expert product advice
• UK technical support
• Installation assistance
• User training
• Preventative maintenance
• Service and repairs
• Calibration support (where applicable)
• Long-term after-sales support

Whether you're conducting advanced biological research, fluorescence imaging, semiconductor inspection or precision industrial analysis, the AUC-390A and AUC-390FLED provide exceptional optical performance, outstanding reliability and professional imaging capabilities for the most demanding applications.