Ei, Si -

Nikon Ei microscope vs. Nikon Si microscope - Quick Compare

Nikon will phase out production of their model E100 and E200 microscopes in the year 2021. The E100 will be replaced by the model Ei LED microscope. The E200 will be replaced by the model Si LED microscope. Parts and accessories for the Nikon Eclipse 100 and Eclipse 200 will still be available for the foreseeable future. 

Where can I buy microscope parts and accessories for my Nikon Microscope? Florida's Authorized Nikon Microscope Dealer

Florida Microscopes


Nikon Ei Educational Microscope USA

Nikon Ei

Nikon Si Clinical Microscope

Nikon Si


10x Focusable

10x Focusable

Field Number

20mm Field of View

20mm Field of View


Fixed Binocular 

30 Degree Angle

Optional Trinocular

Fixed Binocular

45 Degree Angle 

Optional Trinocular


4 Hole Reversed

5 Hole Reversed 


Right Hand - Standard

Right Hand - Low Profile


Variable LED

Variable LED with auto adjustment and Light Intensity Management System (LIM)

Objective Magnifications

4x, 10x, 40x, and 100x   

4x, 10x, 40x, 60x and 100x   

Objective Quality
BE Plan Achromat
E Plan Achromat
5 Years from Nikon 5 Years from Nikon 
Current Pricing
Nikon Ei Nikon Si
Nikon Ei Microscope Nikon Si Microscope
The Nikon Ei microscope is a perfect fit for the educational laboratory and veterinary clinics.
The Nikon Si microscope is a perfect fit for clinics and laboratories. The Si is upgradable for phase and fluorescence microscopy.
Both microscopes are available in trinocular for upgrading to digital microscopy with the addition of a microscope camera.