Analytical Equipment

What Should You Consider When Selecting a Light Microscope?

Patarimai apie tai kaip išsirinkti šviesinį mikroskopą

Nowadays, you have a wide range of microscopes suitable for beginners and experienced researchers. With so many options and accessories, how can you choose the right one without confusion? We’ve put together some tips to help you make the best decision for exploring the microcosmos, whether at home, in a science class, or a lab.

The microscope's suitability for the work area is essential

In which specialized professional sector do you focus your expertise in microscopy? What types of samples do you examine, and what specific practical competencies do you possess? Try to address these questions while you evaluate the precise microscope specifications best suited for your tasks.

  • Do your tasks involve working with samples on a glass slide? In that case, an upright microscope would be well-suited for your needs.
  • Are you working with cells or cell cultures? Or maybe your samples are grown on a plate? Inverted microscopes are the perfect choice.
  • Are you preparing samples and handling objects that demand good spatial vision but not high magnification? In such cases, a stereo microscope would be a suitable choice.
  • Do you have larger samples to study and require more detail? If so, we recommend considering the use of zoom microscopes.
  • Researching large and heavy specimens like metal? Choose light microscopes.

While these light microscopes lack advanced zooming due to light limitations, they’re perfect for home use, budget-friendly, and great for everyday tasks. However, for more intricate research and analyzing finer details, consider exploring highly potent microscopes like a confocal, electron, or ZEISS X-ray models.

The clarity of the sample and the sharpness of its visual details

Employing contrasting techniques is vital to enhance specimen visibility and emphasize visual details. Depending on your needs, we recommend that you consider and evaluate bright-field, dark-field, phase contrast, polarization, and fluorescence contrast techniques for different applications.

The bright field contrast method is commonly used for samples that can be artificially stained or possess natural contrast, such as plants containing chlorophyll, metals, or pigments.

The phase contrast technique helps reveal transparent or thin samples that are hard to see against a low-contrast background. It makes them visible by creating a phase-contrast image of the object.

The dark-field contrast method works well for examining tiny, isolated structural features, like bacteria. It provides excellent sharp contrast, making it suitable for such observations.

The polarization contrast method is beneficial for analyzing materials. When seeking a suitable microscope, ensure it supports this technique. Experts in mineralogy, forensics, and quality control commonly favor such microscopes.

The fluorescence contrast technique is a practical choice when your research demands strong contrast and the detection of individual structures, even at the level of single cells.

The bright field contrast method is commonly used for samples that can be artificially stained or possess natural contrast, such as plants containing chlorophyll, metals, or pigments.

The phase contrast technique helps reveal transparent or thin samples that are hard to see against a low-contrast background. It makes them visible by creating a phase-contrast image of the object.

The dark-field contrast method works well for examining tiny, isolated structural features, like bacteria. It provides excellent sharp contrast, making it suitable for such observations.

The polarization contrast method is beneficial for analyzing materials. When seeking a suitable microscope, ensure it supports this technique. Experts in mineralogy, forensics, and quality control commonly favor such microscopes.

The fluorescence contrast technique is a practical choice when your research demands strong contrast and the detection of individual structures, even at the level of single cells.

Microscope's lighting options

With numerous light sources available, picking the right one can be challenging. The critical thing to remember is that there’s no definitive “good” or “bad” light source. At this selection stage, focus on assessing the microscope’s intended application and desired outcome.

Halogen lamps

  • One of the widely favored lighting sources
  • Used in light microscopes for both bright field and phase contrast techniques
  • Offers sufficient brightness for many polarized light applications
  • Appropriate for examining stained cells and tissue sections, as well as numerous uses of reflected light
  • Cost-effective and simple to replace
  • Ensures excellent colour accuracy

Light-Emitting Diodes (LEDs)

  • A modern light option
  • An economical, dependable, and enduring solution
  • Bulbs typically last around 50,000 hours
  • Perfect for fluorescence microscopy
  • Option to select various colours and wavelengths
  • Tailored to activate fluorescent dyes or proteins

The magnification range

Selecting the proper lens is crucial for achieving accurate magnification and obtaining a lifelike image of the specimen. There are three lenses categories: achromatic, semi-apochromatic, and apochromatic.

In laboratory microscopes, achromatic lenses are frequently employed. They can be positioned close to the sample, offering superb working distance and notable contrast.

Semi-apochromatic lenses have a greater Numerical Aperture (NA), leading to significantly sharper images. Moreover, they enable better resolution and contrast.

Apochromatic lenses achieve the utmost colour correction, ensuring no undesired colours are in the sample image.

When dealing with lenses, it’s also valuable to think about the required magnification range for the lens.

Low magnification range

from 1x up to 5x

Suitable for samples smaller than 25mm

Mid-range magnification range

from 10x up to 40x

Compatible with the majority of microscopes

High range magnification range

from 60x up to 100x

Ideal for examining tiny samples and intricate structures

Connect with professionals for guidance

One of the key recommendations is to rely on experts in the field when searching for a microscope. Experienced consultants specializing in microscopes, accessories, and software possess the knowledge to address your inquiries.

What sets INOSPECTRA consultants apart? Exclusively here, you gain access to professional consultations led by certified experts in Carl Zeiss microscopes, free demonstrations of your selected microscope, and comprehensive guidance throughout the process of choosing and procuring your desired instrument. Our goal is to maximize your contentment with your decision.

Interested? Contact Us:

Ivo

Ivo Smiltnieks
Product Specialist

  • +371 2 9514314
  • ivo@inospectra.com