MEDICAL EQUIPMENT CONDITION DESCRIPTIONS
A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in the courses of https://www.asset.edu.au/retail/ , unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller’s listing for full details.
A new, unused item with absolutely no signs of wear. The item may be missing the original packaging, or in the original packaging but not sealed. The item may be a factory second or a new, unused item with defects. See the seller’s listing for full details and description of any imperfections.
An item that has been professionally restored to working order by a manufacturer or manufacturer-approved vendor. This means the product has been inspected, cleaned, and repaired to meet manufacturer specifications and is in excellent condition. This item may or may not be in the original packaging. See the seller’s listing for full details.
Stereo microscopes design for observing specimens through their high-magnification lens. They implement a straightforward optical-mechanical mechanism featuring a head with two examination tubes with two objectives, a system of lenses, and an inner prism.
The view is a 3D one giving a visual of depth perception! Unlike compound microscopes, the stereo ones use less power and support magnification levels between 5 and 80X.
Also known as dissecting microscopes, stereo microscopes aim to provide an upright, 3D perspective. It is named so, as the observer can easily manipulate the object under view with a significant degree of precision. There is a movable arm using which it is possible to observe the different parts of the object under study.
These microscopes are quite versatile for home labs where your kids can explore supported subjects in detail. So, if you want to buy one such model for your science-savvy kids or your critical research, this guide will help you do so smoothly.
What Are Stereo Microscope Used for?
These microscopes are designed for giving a 3D view of stable things having complex surfaces with the help of reflective or incidental lighting. This is in contrast with transmitted lighting in use by a biological microscope.
If you are taking medical assistant programs you should get one, these devices are ideal for inspecting thick or opaque surfaces via which light usually does not pass. They offer a bit different viewing angles for displaying a multi-dimensional view for assessing minute details.
The primary use of such a microscope is to view big as well as solid planes or specimens. The entomological survey to be done for fulfilling a research goal or the discovery of farfetched, concealed shapes demands a stereoscopic microscope.
Such devices are made explicitly for viewing whole objects such as floras, pests, and rocks. They are also useful for exploring the prepared slides and nature studies. Even young kids can use them for their studies or comprehension.
These microscopes are widely in use for studying the solid surfaces. They are commonly found in tasks such related to forensic engineering, microsurgery, watch-designing, dissection, entomology, circuits, and fractography. They are widely in use in quality control and manufacturing fields and the medical field, where they are used to the investigation of blood or even the creation of new medicines and equipment with medical device coatings for protection of such equipment.
Many models come with a top illuminator for channelizing light downward on the subject. However, higher-end models do come with a bottom illuminator for viewing the subject via the transmitted light.
Low-power or stereo microscopes typically come with both these lights (reflected and transmitted). They are ideal for examining transparent and opaque things. Specimens include sand, soil, stamps, fabric weaves, insects, coins, and minute electrical parts.
For a lab at home, a stereo model is useful although not mandatory. Go for it if you have the budget but do not withhold a compound microscope. It is ideal to go for a compound model only instead of purchasing a cheap stereo or compound model. If there is no stereo microscope, a magnifier or a compound microscope at the lowest magnification is a wise substitute.
The most widely used magnification levels are 20, 30, and 40x. As a thumb rule, more magnification is not always preferable. This is because, at a high level, you end up observing fewer object details. For instance, a coin collector will prefer a 10x model, while a sand collector would need a 40x one.
Usually, three types of stereo microscopes exist namely, zoom models with an incessant range of around 10 to 40x, with two independent powers (10/30x, 15/45x), and single power (20x or 30x). The zoom models come with maximum options for magnification although they are costlier than the single-power ones.
How to Choose a Stereo Microscope?
Now that you are clear about what are stereo microscopes used for, it is time to choose the best model. This is exactly what this section will make it simple for you by sharing comprehensive details.
Selecting a stereo microscope is a thoughtful job and needs sufficient time, proper comparison, and an in-depth assessment of your own needs. After all, it is a critical need that shall escort you for several years of your research.
To get started, just keep in mind that no single brand or model is ideal for all. This is true although there are dedicated brands. You should choose a model and brand as per your budget and requirements.
An individual wishing to buy for a home lab will have requirements and budget different from a professional in a science lab. While there are superb options available, you must assess them meticulously.
If you are strictly on a budget, you can consider used models or clones of popular models. The benefit that you relish here is the easily available accessories such as lenses and eyepieces all of which are working well even in clones.
For buying the best stereo model, you need to find answers to the following questions first:
- What is the purpose or use?
- Which objects do you need to study or visualize?
- What is the budget you can keep?
- How many people will be using the stereo microscope?
Once you know these answers, you need to map them with the following buying factors or criteria:
The right magnification range depends on what you wish to observe. Stereo models are unreliable for observing bacteria and cells, as they need more than 900x magnification.
All stereo models come with the magnification changer featuring optical lenses. With these lenses, you can change the equipment’s magnification. Altering the changer’s position modifies the degree to which you can magnify the specimen. This degree is known as the magnification factor.
The modern models can offer up to 16x magnification (only zoom) and a zoom range of 20.5:1. They also come with encoding abilities for ensuring reliable dimensions.
If you wish to have as much value as possible for the cost, consider the best budget model that provides wide magnification limits. This will allow using the device for diverse specimens and in most circumstances.
Standard eyepieces are associated with 10x magnification although you can replace them with higher magnification eyepieces without changing the working distance. To compute magnification, multiply the eyepiece’s, and objective’s magnification.
In the case of auxiliary lenses, you can change the objective’s magnification as well as the working distance. For instance, a 10x eyepiece, a 2x auxiliary lens, and a 1X objective give 20x magnification.
This is visible as a spherical field while peeping into the eyepieces from a good distance and with the precisely configured interpupillary distance. Its diameter is reliant on the magnification. For example, 10x magnification power facilitate an object field having a diameter of 23. At 3x, the diameter of the object field narrows to 1/3rd part.
The depth of Field (DOF)
In microscopy, this factor is an experimental parameter. However, in reality, the correlation between magnification, resolution, and numerical aperture governs DOF. To get the best visual impact, the adjusting ability of modern microscopes balances the inversely proportional factors namely, DOF and resolution.
At low magnifications, you can raise the DOF by decreasing the numerical aperture (stopping downwards). Nevertheless, a smaller numerical aperture indicates a lower side resolution.
In short, you need to strike an optimum balance of DOP and resolution as per the object’s structure. It is essential to compromise in favor of higher DOF significantly, as the z-dimension often uses it.
Most stereo models provide some space for object steering. You need to ask yourself whether you will be welding a printed circuit board or observe a fixed biotic specimen. You must match your purpose with the field of view and working distance.
The working distance is the distance between the focused object’s top surface and the objective front lens. Usually, it decreases if the magnification increases. In the world of stereo microscopy, this factor is important to consider, as it directly affects the usability of the device.
In short, this distance should allow you to work with fingers beneath the objective. Many classic models including their clones come with 100mm of working distance, which is ideal. As per the application, you can raise or lower the distance using additional lenses.
Quality of Construction
A durable model is the one that is made using glass optics and only-metal frames. The plastic parts do not tend to last for long. In case of lack of budget, consider going through the reviews before investing in your own preferable equipment. If there is a plastic frame, it is essential to defend it and prevent its exposure to sunlight.
This is the key to put all work under light using a stereo microscope. If illumination is right, your visualization will cover all the parts of the specimen or give new details only by modifying the light type. You need to match the illumination precisely to the right application.
Mostly, modern options have different lighting options due to which there is no need to move the tool from one area to the other. For many, fluorescent and tungsten illuminations are better than halogen and LED systems. However, the latter two are also durable and reliable. Of the two, the halogen ones are costlier.
Following are the illumination systems available for stereo microscopy:
- Incident: For non-transparent objects as spots, ring light, and so on, as per the objects’ texture and usage requirements
- Transmitted: For diverse transparent specimens including biological to polymer specimens
- Standard Transmitted Brightfield: For transparent specimens with adequate color details and high contrast
- Oblique Transmitted: For transparent specimens that are almost colorless
- Darkfield: For channelizing an inverted hollow cone at slanting angles towards the specimen using a specialized stand having a reflection mirror
This factor delivers high definition and clarity from the middle of the specimen to the Field of View (FOV) edges. The FOV needs to be as wide as possible along with eyepieces with WF label.
The Top 10 Best Stereo Microscope
Lynx Evo Stereo
This microscope is known for its high 3D productivity without eyepieces providing fatigueless experience and health benefits. Such a patented and award-winning model eliminates confined work practices due to which efficiency is improved via matchless ease of use and ergonomic design.
You can expect quick and precise inspection across a greater peripheral view for a myriad of applications. Some other salient features are 10:1 zoom ratio having up to 60x magnification range with two different adjustments, HD camera, long working distance, large depth of focus, and flexible stand options.
Zeiss Discovery V8
This manual stereo microscope features 8:1 zoom utility for rendering crisp images regardless of the set zoom range. Its pickable click-stops pave way for distinct magnification for calibrating pixel sizes. Automated Sample Storage provide tool support different light sources for examining biological samples. Illumination and contrast methods are on offer as per the LED or cold light.
While the standard magnification range is 1 to 8X, extra additional objective lenses can raise the same up to 300X. Some more salient features include lateral oblique light, support for phototubes for digital photos, five fluorescence filters, coaxial light management, and differing viewing angle with the ergo phototube.
Zeiss Discovery V12
This one is known for outcomes over the mechanical 12:1 zoom range. All the motorized components are fully integrated into its ZEN and AxioVision software packages for gauging and recording biological, electrical, and quality assurance samples reproducibly.
You can expect crisp and contrast-rich images with superb color fidelity and more information. The microscope comes with improved resolution. The exterior and ergonomic SYCOP touch controls have all useful functions ranging right from magnification to brightness.
Some more features include illumination as per the cold light or LED and great depth perception at a high level of magnification.
Nikon SMZ 1500
This one is admired for its modular system, which enables working with a variety of microscopy options. A few major improvements are the presence of high-quality optics and the ease of attaching cameras. This tool supports a wide magnification range as per 15:1 zoom ratio, very long working distance, fluorescence imaging, and different illumination options for brightfield and fluorescence images.
The microscope is used in forensic science, vet world, and cell and marine biology. Some other salient features include up to 540x magnification, coaxial support, and diverse stands.
This one is ideal for routine research in which a big working distance and field view are critical. With its numerical aperture of 0.2, the resolution of 600 line-pairs per mm is highly efficient as well as accurate enough to give all sample details.
The microscope comes with the 10:1 zoom ratio and up to 126x total magnification. The common objective design fits well in its fully modular build providing a myriad of options. The lens system is such that the users can view and document samples with their original colors without any deformation. There are also ergonomic components due to which users can retain their natural posture.
This stereo is in use for tissue preparation and sample documentation. It is equipped with a 12MP digital camera, several filters for adjusting brightness, color temperature, and even illumination.
The tool has bright halogen illumination and auxiliary lights for brightfield, fluorescence, and darkfield transmissions. There are reflected light illumination options and filters for imaging different formats.
This is another award-winning eyepiece-less stereo microscope known for its striking 3D imaging and matchless comfort levels due to ergonomic design decreasing fatigue and increasing productivity. With magnification settings of up to 20x, it is one of the best stereo microscopes with high performance for several precision tasks.
Some other salient features include long working distance, large view field, ergonomic design, and great hand and eye coordination. It is widely in use in inspection and manipulation tasks.
Nikon SMZ 745
With the total magnification of 300x, 7.5x zoom magnification, and 115mm working distance, this microscope is designed for biomedical as well as industrial jobs. It features a new prism that renders higher-contrast, brighter images as well as an anti-mold, anti-electrostatic, and anti-contamination design for use in high temperature and humidity.
The tool comes with a microscope camera port and other accessories for direct mounting of Nikon DS cameras.
Zeiss Axio Zoom.V16
This stereo microscope is admired for its ability to render at a high resolution and 16x zoom range. Not only that but also its single objective, a high numerical aperture of 0.25, and a big working distance allow zooming flawlessly across the smallest to large fields for all details.
You can expect a very high aperture in a zoom range that is medium. In other words, you receive the output with superior bright fluorescence in big fields. Large tile outputs at low magnification are its forte so that you can get the desired speed and ease of capturing. The objective aperture is larger than many stereo microscopes and offers clear output.
Olympus SZX 7
Designed for easy use and comfortable experience, Olympus SZX 7 modular microscope is ideal for operational and optical performance in both routine tasks to advanced research.
It features the Galilean optical system that is known for its best zoom ratios, excellent image clarity, authentic color retention, and precise reproduction of the original image using a total magnification of 336x. It supports transmitted LED and fiber optic illuminations.
Stereo microscopes have their specific uses due to their improved components, aperture, DOF, magnification range, zoom range, and field view. While shopping for the most suitable one, consider your budget on priority. If lacking, consider buying a reliable, used model from a reputable seller, such as biotrackmedical.
- Olympus Stereo Microscope: The modern Scientific diagnosis - February 12, 2013
- Top 10 Stereo Microscopes for Science Research and Medical Diagnosticians - December 22, 2012
- How to Choose a Stereo Microscope for Your Laboratory - March 20, 2012