OMAX - MD827S30L Built-in 3MP Camera 40X-2000X Digital Biological Compound Binocular LED Light Microscope with Double Layer Mechanical Stage Oil Immersion NA1.25 Condenser

Great product.

The following are my opinions based on my purchase and use of this microscope and 35 years of experience teaching science.A. Easy to put together, and works well.B. Looks like a professional model with heavy metal construction.C. Stage has smooth action (x, y, and z dimensions) and spring loading clips for holding slides.D. Two pairs (10x and 20x) of ocular lensE. Calibrated transition of objective lens: 4x, 10x, 40x, and 100x. (I did have to tighten a couple of lens on my scope before they worked appropriately).Notes!Magnification Tip: Total magnification (in two dimensions or area) can be calculated by multiply objective by ocular lens, (e.g. total magnification would be (100x)(20x) or 2000x. The magnification in one dimension (length or width) would be the square root of the total magnification or about 45x for 2000x. Students /hobbyists typically use more magnification than is appropriate so only use the oil immersion lens when absolutely necessary.ViewingTips and Adjusting MicroscopeA. Typically raise brightness as magnification increases (but using too much light, is a very common error).B. Incorrect adjustment such as lighting, focus (including vertical stage distance), iris control, and magnification can be very detrimental for appropriate viewing. 1. Students often (except animal histology and microbiology application) use a higher magnification than is appropriate. Avoid using the oil immersion lens unless it is absolutely necessary. If it is used, make sure oil is applied and never use the course focus or vertical stage adjustments. Because there are no safety brakes (typical with most compound microscopes) using this magnification incorrectly might easily damage the objective lens and slides are very possible. 2. Usually, the objective lens are installed so once the focus is obtained, moving to the next higher lens should only require the fine adjustment (typically about one complete turn in one direction or about two turns back in the opposite direction). 3. If your microscope does not comply with the previous tip, make sure your lens is screwed in tightly, If this does not work, the "O" ring (gasket) might be missing,damaged, or the wrong size. (I have made temporary gaskets from several different cardboard thicknesses to check the size needed. They will work fine unless you get them soaked with oil or water etc.).C. Instruments (especially microscopes) are often blamed when the fault is due to inappropriate use. Manuals are sometimes poorly written when produced in some countries, but most compound microscopes work the same way and other manuals might be more applicable for you. As always, the more you use it, the greater your skills will become. (Some negative reviews are inappropriately given because the user has poor skills or familiarity with the product).Seriously, this microscope is an excellent value that you will not regret purchasing (assuming you learn how to use it). Some negative comments appear to be from individuals who don't know how to use/adjust the microscope (software may be more problematic depending on what computer system you have...windows 8.0 worked great but I had problems with an older laptop. I was a college science instructor (including department head responsible for purchasing microscopes) for over 30 years and have never seen microscopes this nice for less than $1000 and these did not have the computer hook-up. If you need a microscope, this is a wonderful deal.

Excellent value for the price. The unit did not come with instructions or links to the camera software. So you will need to search for those. A small pain for a good value.

it is good. The 'lens size' is very small. My vet is always disappointment that she cannot get a good view of the cells. It is also very difficult to get that 'fine tune' focus. I can never get the eye pieces so that I can see through comfortably. But it doesn't matter because I can view on the computer. It is a good starter microscope

Arrived intact, excellent working order, arrived as advertised. Used daily for cytologies and blood smears with no issues. Very good value for price. Very good microscope for this price range. Obviously there are better ones out there but at this price it is great. Had pricier ones before and this one is just as good.