Archive for the ‘Stereo microscope’ Category


Nuhsbaum Distributing NIGHTSEA is Exciting!

Fluorescence for everyone!

Fluorescence is a critical component to biology research and has a significant number of applications in forensic science, materials science, and industry. Fluorescence microscopy is literally everywhere. It has become so important that some labs have capacity issues with lengthy sign up sheets. Although it’s a critical technique many educators have budget limitations that prevent them from purchasing a fluorescent microscope to introduce the concepts of fluorescence microscopy.

Enter NIGHTSEA fluorescence systems. These are designed to adapt to virtually any stereo microscope and be affordable for labs and classrooms from the quality control lab to university research labs.

NIGHTSEA has leveraged the power of LED’s and straightforward filter systems to produce an external gooseneck fluorescence system that is compatible with most of the fluorescent probes used in stereo microscopy.

The system is portable, so it can move between benches, students, microscopes and in some cases, out of the lab and into the field. The system is simple enough for even novice users to operate easily. It’s also very affordable so labs and classrooms can add several systems to existing microscopes.

With NIGHTSEA – Sharing is caring!


All your favorite applications with your favorite microscope!

The applications in biology are endless, however, some labs feel the pressure of fluorescence microscopy throughput than others. There are plenty of C. elegans and Drosophila labs that have rows of benches full of screening and sorting microscopes. These labs often have one or two fluorescence microscopes in a dark room which have a lengthy sign in sheet.

Enter NIGHTSEA! Many labs will benefit from the general screening and sorting on the routine microscopes sitting on the bench. Any sample with abundant fluorescent proteins are visible with NIGHTSEA systems.

Trace evidence stereo microscopes are often configured without fluorescence, however, there are several applications that would benefit from fluorescence! Don’t miss critical material because your existing microscope doesn’t have fluorescence!

Fluorescence in industry? You better believe it and NIGHTSEA is here to help! Identify cracks, fibers, contaminants in materials with fluorescence with NIGHTSEA.

Microscopes are a standard fixture in most science classrooms, however, very few colleges and universities educate students with hands on fluorescence applications. An often-cited obstacle to fluorescence in the classroom is cost. However, with NIGHTSEA the cost can be less than the cost of a single stereo microscope.


When performance matters, save with Leica!

Although NIGHTSEA is an incredible system that works with most fluorescent labels, it doesn’t work for everything. There are plenty of applications that just do not have abundant fluorescent protein – or subtle fluorescent material. In both instances fluorescence will be difficult to detect without a high-power light source and finely tuned fluorescent stereo microscope.

Leica has many competitively priced fluorescent stereomicroscope systems such as the MZ10F, M165FC, or M205FA. When combined with demo equipment, a fluorescent stereo microscope can be much more affordable than you think!


Trust W. Nuhsbaum, Inc.

As a market leader in stereo microscopes, Leica is unmatched with options and accessories for student, Greenough, and CMO stereo microscopes. W. Nuhsbaum provides simple turnkey solutions or we can completely customize a Leica system to your specific application.

Trust the sales representatives and imaging specialists at W. Nuhsbaum to configure the perfect stereo microscope for you.

What do you call a Drosophila who likes to drink? A bar fly!

Long hours under the microscope are no joking matter!

The thought of a Drosophila headed to the local bar for a drink creates a funny joke, but after long hours of sorting flies under a microscope that causes eyestrain or neck pain, you may be the one that wants to head to the local bar for a drink!

Unfortunately most users do not know why they experience discomfort when using a stereo microscope. Users who have several microscopes to choose from in a lab or in a manufacturing inspection setting simply sit down and use the preferred microscope. They tell their co-workers that they like to use one over another but they cannot explain why.

While preference may be for something such as ergonomics, a common cause is simple: one requires eyes to rotate inward and the other allows the eyes to relax and look through the microscope “straight on.”


Greenough v Galilean Optical Paths

Many Blood Moons ago around 1890, the American biologist and zoologist Horatio Greenough introduced a design to microscopy that would provide an accurate representation of the sample with a large field of view, low magnification, and depth perception. The design was simple, create a light path for each eye where the lenses are mounted at a 12.5 degree angle and focused on the sample at a center location.

a) CMO optical design that uses a single objective to combine right and left light paths to generate a stereo image.
b) Greenough optical design that angles light toward a center point beginning from the eyepieces.

Since the image is passing through the center of every lens in the optical system, the design produces a quality image that is still being used today in many stereo microscopes. However, the 12.5 degree angle causes the eyes to have to rotate inward often causing discomfort.

Fast forward to 1957 when the American Optical Company introduced their Common Microscope Objective (CMO) design. The new design took inspiration from the Galilean telescope where each eye would have a series of lenses that were mounted flat and the image would be bent inward and focused by a single lens at the bottom of the microscope. Correction for the single lens is more challenging, but this design provides users with the sensation of looking across the room, as opposed to the tip of one’s nose!


Eyestrain Doesn’t Just Hurt Eyeballs

Although eyestrain is an acute ailment that disappears quickly after walking away from the microscope, the effects of eyestrain can be felt for some time. In severe cases eyestrain can lead to all types of headaches. For some users the sensation is immediate, where for others it takes hours to detect the discomfort.

Although graduate students and lower-level employees are accustom to working through less-than-ideal conditions, no one should be denied the joys of a genetic screen or solder inspections because of a headache caused by eyestrain!

The experience is easy to recreate by attempting to focus on the tip of your nose. After just a few moments your eyes will begin to hurt! Although the sensation looking through the microscope is more similar to reading a newspaper a little too closely, and therefore may take hours to fully develop, the sensation is the same.


How to Adjust a Stereo Microscope for Comfort

Whether your stereo microscope is Greenough or CMO, the optics can be adjusted to optimize comfort. Based on design, CMO will always be more comfortable, but a simple adjustment can make a big difference.

On a Leica microscope the adjustment is easy. The eyepieces when rotated left or right, adjust the eyepiece lens in and out. Looking at the eyepiece housing, there are white markings that indicate whether the eyepiece is adjusted left or right of center. Center is the larger white line. Center the line on the eyepiece housing and shaft and proceed as follows:

  • Zoom out to the lowest magnification setting. Focus the microscope using both eyes. This gets you in the ballpark for the next steps.
  • Zoom to the highest magnification, refocus the microscope with both eyes.
  • Zoom to the lowest magnification again. Without focusing the microscope, twist the right eyepiece in both directions until the image comes into focus.
  • Close the right eye and open the left eye. Without adjusting focus on the microscope, twist the eyepiece until the left eye is focused on the sample.

  • At this point, with both eyes open, the sample should be perfectly focused. In addition, the zoom body will be parfocal throughout the zoom range! Repeat this process at high magnification and you will be in the best position for a comfortable viewing experience!


    Trust W. Nuhsbaum, Inc

    When choosing a stereo microscope for routine inspection or advanced imaging, it takes the knowledge and experience of a microscope specialist to ask the right questions that identify your needs. It also takes a company with the resources of W. Nuhsbaum, Inc to be able to demonstrate the difference in Leica quality regardless of Greenough and Gallelean stereo microscope design.

    Contact one of W. Nuhsbaum, Inc.’s microscope experts to learn more about the stereo microscopes that will make the difference in your work.