Buy Used Microscope
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All of our used microscopes are refurbished mechanically and optically by our factory trained technicians. All microscopes come with a 1 year warranty from date of purchase. We can custom configure any used microscope. If you are looking for a microscope and cannot find it on our website, email us - we may have it.
2. If you are buying a microscope to duplicate one you already have, or have used in the past make sure the microscope is configured the SAME way. Back to the car reference, the same model microscope can be configured many different ways. There are various types of heads, objectives, eyepieces, etc.
5. Ask when the microscope was last lubricated. Microscopes have internal gears and parts that contain grease. Overtime this grease will dry up. If the grease dries up the entire focus mechanism could seize up.
6. Just because the microscope was \"Just Serviced\" a few months ago does not mean it is still working fine! Back to the car reference you could take your car home from the service center and in two weeks another minor issue could pop up.
Microscopes are essential for taking a closer look at a cell sample or a similarly tiny object. eBay's new and used microscopes can be useful for students, professionals, and amateurs alike. To narrow down your search for a microscope on eBay, take a look at these common customer questions.
There are many different types of microscopes in this category, and each type of instrument magnifies items using different mechanisms. Among all of the different models, there are three basic categories:
Yes, some of the microscopes in this category can be connected to computers. Almost all digital microscopes, for instance, come with USB connectors, and when you plug these devices into your computer, you can view what your microscope is magnifying in real time. You can even take pictures or videos of the items that you're magnifying for future reference when you connect digital scopes to your computer.
You'll need to consider your intended application in detail as you pick the microscope that's right for your purposes. If you plan to do a lot of lab work and don't foresee yourself moving your microscope around a lot, a traditional compound scope might be right for you. However, since digital scopes are lightweight and portable, they may be more convenient if you see a lot of field work in your future. eBay's selection of microscopes is varied and offers microscopes for a variety of applications.
Most Quekett members prefer to buy used microscopes made by reputable manufacturers rather than buy new ones that are far more expensive. However, it can be difficult to find used microscopes and accessories, so you may find this list of sources in the United Kingdom useful.
There are a lot of inexpensive microscopes available, of widely varying quality; some of the good ones cost no more than some of the nearly useless \"toy\" models. You don't have to be an optical expert to make a good choice, if you follow the simple evaluation criteria given here. Remember that \"experts\" don't always agree, and trust your own evaluation skills. The advice that follows is intended for teachers, parents, and school volunteers who are looking for good classroom equipment. An adult amateur will want a somewhat different microscope that can be upgraded with different lenses and accessories as the hobby progresses. Both will benefit from reading one of the several well-written introductory books that are available; Nachtigall, Exploring With the Microscope, for example. Full information on that book and many others can be found in the MICRO booklists, on this website. You'll find another useful discussion of microscope selection at .
The first choice is between \"simple\" and \"compound\" microscopes. A \"simple\" microscope (Leeuwenhoek used one) has just one lens and a \"compound\" scope has both an objective and an eyepiece. Don't buy a \"simple\" design! The working distances between eye and lens and lens and specimen are so small that they are very difficult to use. And a single powerful lens has so much aberration that the student who manages to get an image will be disappointed by its quality. Unfortunately, there are quite a few models offered in school supply catalogs.
Two types, actually, in roughly equal numbers for middle school. Inspection/dissection scopes are used to look at surface details of large, opaque specimens at relatively low (20-30x) power. Illumination is usually from above, and the image is erect, as in the \"real world\". Compound microscopes are usually used with transmitted light to look through transparent specimens; the useful school magnification range is 10-400x. The image is inverted. It takes a bit of practice to follow a moving subject when it's upside-down.
\"Magnifies 600-1200 times!\" NO. When you see this claim in an advertisement, it's good reason to read no further. The wavelength(s) of visible light and the optical properties of glass lenses used in air (rather than the \"immersion oil\" used with research microscopes) limit the useful magnification of a compound school microscope to 400x; more is \"empty magnification\". Magnification can be calculated by multiplying the power of the eyepiece lens by that of the objective lens. For example, using a 10x eyepiece and a 40x objective gives 400x. Higher magnifications are achieved in \"toy\" microscopes by using an eyepiece of excessive power, which in turn makes the field of view very narrow, while emphasizing all the aberrations of the image produced by the objective lens. It's like enlarging a snapshot from a cheap camera to poster size; it's bigger, but there's no more detail. Most school microscopy needs 10-100x (bacteria require 400x). True 1000x imaging requires a 4th objective (100x) in the turret, a multi-lens focusable condenser, plus the use of immersion oil. It should only be considered for advanced high school classes.
\"Zoom magnification!\" NO. This is related to the preceding problem. A zoom eyepiece just makes things worse, because cheap zoom optics are full of aberrations. Magnification changes in a compound microscope should be accomplished by changing objective lenses, not by zooming the eyepiece. And that is best accomplished with a lens turret rather than changeable screw-in lenses, which are easy to damage or lose.
Condenser. MAYBE. Although the substage condenser, which focuses illumination on the specimen, is an essential part of a research microscope, it should be avoided in the $100 price range. If one is offered it will be a single lens which can't be focused, fixed in the stage. It will be easy to damage and difficult to clean.
Projection microscopy NO. Even if you can completely darken your room, illumination sufficient to project an image with one of the cheap direct projection scopes will also fry your specimen. Some manufacturers do have good, educationally useful video projection systems, but their cost makes it doubtful that they're \"worthwhile\" if the budget is limited. A separate digital camera connected to a computer is a better choice. The new digital microscopes that project onto a monitor allow the whole class to see the same thing at the same time. Avoid the \"digital microscopes\" that incorporate camera electronics into a glass-lens microscope itsef. That electronics will become obsolete rapidly, forcing you to abandon and replace the scope when it's optical and mechanical condition are still good.
Made in the U.S.A. NO. Brand names are no guarantee of American manufacture. Almost all American-brand microscopes are imported, and even scopes that are advertised as American-made will have important imported components, such as lenses.
A flat focal plane. You can't expect inexpensive lenses to have a perfectly flat field; so-called \"plan\" lenses are costly. You will, however, find a lot of variation in quality; try to do a side-by-side comparison if you're choosing between two models. You're looking for an image that's really sharp from the center almost to the edge of the field of view, rather than one that must be refocused for each part of the circular field.
No astigmatism. As you go thru the focal point (fuzzy-sharp-fuzzy), look for a \"linear\" image distortion that rotates 90 degrees as you go from above focus to below focus. This can be caused by an objective lens that isn't round or (more common in cheap optics) a lens that is tilted in its mount. Rotate the eyepiece to check for the same problem with that lens.
Major scientific supply catalogs and some of the school supply houses will have them; this web page has a dealer contact list. A microscopes-only dealer may provide both a presale quality-control check and in-house service. Shop carefully; prices may vary by 50% or more.
If you know enough to evaluate a used scope or repair a faulty one you probably won't be reading this basic advice. Microscopes don't \"wear out\"; they're often on the market because they aren't working as well as they should. Used research scopes will have extra controls that will be very confusing for both teachers and students.
EquipNet is the leading global provider of used microscopes and other preowned equipment. Our exclusive contracts with our clients yield a wide range of used microscopes from a number of OEMs. These OEMs include Zeiss Inc., Nikon, Olympus, Leica and many others. Our inventory is always changing but we are constantly receiving used microscopes in various models and styles, featuring inverted microscopes, research microscopes, microscope accessories and more. If you do not see the used microscopes you are looking for, call one of our representatives and we'll find it for you. We can also source the right tooling and change parts that you need through our huge network of corporate clients from around the globe.
Olympus is a leading global provider of imaging technologies and microscopy equipment for various industries. Olympus manufactures a range of microscopes that are widely recognized for their high quality and performance. EquipNet carries a range of used Olympus microscopes, such as the Olympus MX61A Microscope, BX51 Microscope, SZ-PT Stereoscope, and many others. 59ce067264
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