Eclipse Si

Nikon has designed the ECLIPSE Si to meet the rigorous demands of professionals who spend hours using the microscope. The ECLIPSE Si is ergonomically designed to enhance operational efficiency. This powerful instrument helps you to stay focused for longer by reducing the strain on your body. The ECLIPSE Si is the new standard in microscopes, expanding the possibilities of exploring the micro world.

Pursuing efficient workflow

The ECLIPSE Si has been developed with the primary goal of reducing fatigue during microscope usage. The ECLIPSE Si eliminates unnecessary adjustments and enables efficient and comfortable operation. The ergonomic design also enables natural posture, even when carrying out repetitive tasks.

Maintaining comfortable brightness when switching magnifications

Objectives with different magnifications transmit light to varying degrees. Therefore, light intensity must be adjusted every time the user changes the objective. In addition, when switching from high to low magnification objectives, the sudden increase in brightness often causes eye strain. The ECLIPSE Si features the intelligent Light Intensity Management (LIM) which automatically remembers and sets the light intensity level for each objective. The LIM feature reduces up to 40% of the time spent on adjusting light intensities*. With the ECLIPSE Si, users can increase comfort and save time even when the routine requires frequent magnification changes.

Ergonomically designed to reduce strain on eyes and body during long- term observation

  • The intelligent Light Intensity Management (LIM) Feature automatically remembers and reproduces the light intensity level for each objective,maintaining the appropriate brightness when switching magnifications
  • The low stage design reduces arm andshoulder fatigue when changing Specimen slides
  • The Stopper, Which Sets the upper limit of the stage height,eliminates the risk of damage to the slide and objective when changing samplesand focusing
  • Equipped With an LCD screen that displays the magnification, illumination, etc.
  • The Unique diascopic fluorescence illuminations method enables fluorescence imaging without mounting an epi-fluorescence attachment

Technical Specifications
Main Body ECLIPSE SiECLIPSE Ei trinocular set
Optical system

CFI60 Infinity optical system
Illumination High luminescent white LED illuminator (Eco-illumination)
  • Built-in fly-eye lens
  • Up to two 45 mm diameter filters can be installed*1
  • Light Intensity Management (LIM) feature included
Focusing Coaxial coarse/fine focusing (located on both sides), cross roller guide Focusing stroke: Up 2 mm/Down 13 mm, coarse: 37.7 mm per rotation, fine: 0.2 mm per rotation, minimum reading: 2 μm With coarse focus knob torque adjustment ring and stage vertical movement stopper
Eyepieces (F.O.V., mm)

With diopter adjustment

  • E2-CFI 10X (20)*2, E2-CFI 15X (12)*2
  • CFI 10X (22)*3, CFI 12.5X (16)*3, CFI 15X (14.5)*3

Inclination angle 45°, pupillary distance: 50-75 mm, eyepoint height: adjustable to 2 positions

  • EC-T-TB2 Binocular Tube 2
  • EC-T-TF2 Trinocular Tube F2
    (Eyepiece: Port: 50:50, built-in 0.55X relay lens in camera port, with C-mount)

Inclination angle 25°, pupillary distance: 50-75 mm

  • C-TB Binocular Tube
  • C-TF Trinocular Tube F (Eyepiece: Port = 100:0, 0:100)
  • C-TT Trinocular Tube T (Eyepiece: Port = 100:0, 20:80, 0:100) Inclination angle 10°-30°, extension: up to 40 mm
  • C-TE2 Ergonomic Binocular Tube (Eyepiece: Port = 100:0, 50:50 via optional C-TEP3 DSC Port C-0.55X)
Nosepiece Reversed-type quintuple nosepiece (within main body)

Rectangular mechanical stage (within main body), with specimen holder 2L and vernier calibrations, cross travel: 76 (X) x 52 (Y) mm
Objectives (NA / W.D.)
  • CFI E Plan Achromat 4X (0.1/30mm)*4
  • CFI E Plan Achromat 10X (0.25/7mm)
  • CFI E Plan Achromat 40X (0.65/0.65mm)
  • CFI E Plan Achromat 60X (0.8/0.3mm)
  • CFI E Plan Achromat 100X Oil (1.25/0.23mm)

Objectives for phase contrast observation:

  • CFI Achromat DL 10X (0.25/7.0mm)
  • CFI Achromat LWD DL 20X (0.40/3.90mm)
  • CFI Achromat DL 40X (0.65/0.65mm)
  • CFI Achromat DL 100X Oil (1.25/0.23mm)

Other CFI60 objectives can also be used.

Condenser Abbe Condenser, NA 1.25, vertically movable and centerable
Observation methods*5 Brightfield, phase contrast, diascopic fluorescence, dark-field, simple polarizing
Fungus-proof treatment Antifungal paint is applied around optical system
Optional accessories
  • E2-SPH1 10X-40X PH slider/E2-SPH2 100X PH slider (used with phase contrast objectives)
  • E2-F-FL Dia-FL set GFP-B
  • E2-SDF dark-field slider
  • E2-DP simple polarizer, E2-PSA simple analyzer
  • EC-ER eye-level riser
  • E2-F-BF blue light blocking filter
  • Object marker
  • Eyepiece pointer
  • Teaching head
Power supply
Uses the included AC adapter (input: 100-240 VAC, 0.48A Max., 50-60 Hz, output: 5.0 VDC, 3.0A Max.)
Power consumption (max.) Nominal value: 5 W
Weight (approx.) Approx. 6.0kg (when equipped with binocular tube), approx. 6.4kg (when equipped with trinocular tube)

Dimensional Diagram

Specimen Gallery

Bright-field observation
Phase contrast observation
Diascopic fluorescence observation
Dark-field observation
Simple polarizing observation