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Nikon Microscopes for Biological Use
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A longer parfocal distance of 60mm allows for greater resolution and the ability to place accessories within the optical path.
This instrument has 10-1500x magnifications, a built-in LA60 color balance filter and an LED illuminator that doesn’t generate heat that can harm specimens.
Additionally, the Eclipse 55i advanced features include:
- Nikon CFI60 Optics
- Refocusing stage
- Stay-in-position stage handle, regardless of x-y position
- Ergonomic Eyepiece Tube, adjusts 10-30 degrees and extends up to 40mm
- Convenient Controls on the lower right-hand side
- Epi-fluorescence Illuminator
Although it does not provide the same degree of automation as, for instance, the 90i, the Eclipse 55i is a microscope for serious scientific research. The E200 described below is considered an solid microscope more for educational or simple laboratory settings.
The Eclipse E200
Several Nikon microscopes feature the CFI60 optics, but this is the first basic research or educational microscope to incorporate this system.
A compound model with superior imaging, the E200 provides flexibility through its ability to be customized. 
Similar to other Nikon instruments, a comfortable configuration and operational ease are inherent in the design.
A wide footprint and one-piece construction make this a stable platform resistant to vibrations.
Eyepiece tilt and height can be adjusted for comfortable periods of long use and controls are arranged for one-hand operation.
Other notable features include:
- Advanced Eyepieces, 10x and 15x with separate diopter adjustments for each eye
- Refocusing Stage
- Upper Limit Stop to prevent contact between the objective lens and specimen
- Anti-mold Design
As with most Nikon microscopes, upgrading the E200 is possible with a host of available accessories. To meet different viewing requirements, Abbe, Phase and other Eclipse series condensers can be used on the E200.
An epi-fluorescence attachment allows fluorescence and UV observations. To observe crystals, a polarizer is available that fits over the field lens.
Side-by-side and face-to-face teaching heads are advantageous for student instruction along with a drawing tube – a unique accessory that facilitates specimen sketching.
A trinocular eyepiece tube allows for a digital camera system.
Nikon has a reputation for producing clear optics and E200 is no exception. Easy to use and solidly built, this is a versatile, durable instrument.
Though considered a more basic microscope as compared to the Eclipse 55i, some consider its price high for the features offered.
Nikon's Interchangeability
As for use with other microscopy imaging techniques, the Nikon Eclipse E200 to do fluorescence microscopy is a more than sufficient instrument to use in any microscopy lab.
When an upgrade is possible to, for instance, an Eclipse 80i research scope, the end-user is able to just transfer the fluorescence unit to the 80i model without incurring any additional costs.
A true benefit is that Nikon microscopes are fully upgradeable and so the Eclipse series easily interchanges accessories with other Eclipse models.
Other Nikon Biological Microscopes Reviewed
For more information covering Nikon's older and newer biological series check out the Optiphot, Labophot, and other Eclipse models.
If digital capability is a true necessity then discover Nikon Digital Microscopes - 80i and 90i models here.
Quick Summary
Utilizing the most advanced levels of technology, Nikon microscopes are quality, precision instruments.
The company’s first hurdle in 1917 was to produce the highest quality optical glass and, today, Nikon is the only company that still maintains control over the glass used in their optical products.
The price points aren’t low but the quality is high.
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