Focusing your microscope is the key to getting the clear image quality you expect out of your microscope. When first looking at a specimen, the item will almost always never be focused. Learning how to focus your microscope is the essential step to assure proper observations and results.
Here a five easy steps for focusing your microscope:
1. Place prepared slide underneath the viewing tray of the microscope and secure with clips
2. Look through your eyepiece and determine if you can see the specimen. The specimen may be fuzzy and/or unrecognizable.
3. Turn the coarse focus knob slowly. Continue turning the coarse focus knob until the specimen becomes recognizable.
4. Next slowly turn the fine focus knob until the image becomes sharper and clear. At this point small details about the the specimen should be crystal clear.
5. Adjust the diaphragm of the microscope to ensure the entire specimen is in your peripheral view.
A compound microscope is ideal for students majoring in bio/medical fields as well as for homeschooling and hobbyists. Compound microscopes are ideal for slide observations, which is what most students are required to examine in the classroom. Our Binocular Biological Compound Microscope is an ideal starter microscope for students and is on promotion right now for a low price of $198.99.
This microscope is great for students because it can be easily upgraded with a digital camera, a darkfield adjustment, and slides. This microscope is easily customizable and easy to use. Compound microscopes will continue to be a crucial part of research in scientific fields. The compound microscope is still a mainstay in many fields and also is a wonderful tool for students to begin with when learning how to use these instruments in a laboratory. Their ability to provide higher magnifications and excellent resolution of a specimen makes the compound microscope an important tool for scientists and students alike.
Product features include:
- High quality professional optical glass elements
- 45°inclined 360°swiveling binocular head
- Easy to mount electronic eyepiece (digital microscope camera)
- 8 levels of magnification: 40X-80X-100X-200X-400X-800X-1000X-2000X
- 4 achromatic objectives
- 2 pairs of eyepieces: WF10X and WF20X
- Sliding interpupillary distance adjustment
- Ocular diopter adjustable on both eyetubes
- Variable intensity illumination
- Coaxial coarse and fine focus adjustment
- Focusing knobs on both sides
- Stage upward moving lock protects objectives and slides
- Stain-resistant double layer mechanical stage
- NA1.25 Abbe Condenser with iris diaphragm & filters
- Rack and pinion adjustment condenser
- Product GS and CE approved
Darkfield microscopy requires a special stand containing a reflective mirror and light shielding plate at a specific angle. The inverted hollow cone is projective of the desired image at an oblique angle. This process is the same for both stereo microscopes and standard compound microscopes.
Good specimens for darkfield microscopy are those close in value to their background images. Small aquatic organisms and cells are ideal for such microscopic lighting technique. Specimens preferred for use with brightfield lighting are not recommended. Other ideal specimens for darkfield microscopy under a stereo microscope include bones, fibers, yeast, and hairs.
Illumination from brightfield lighting involves blocking out central light rays along the central axis. Blocking these rays allows for only oblique angled rays to strike the specimen resulting in a hollowed cone illumination of the desired specimen.
In darkfield lighting, contrast is greatly enhanced by the lighting technique at hand. Highly oblique light rays, diffracted by the specimen and yielding first, second, and higher diffracted orders at the rear focal plane of the objective, proceed onto the image plane where they interfere with one another to produce an image of the specimen.
We recommend our 1600X Darkfield Compound 9MP Digital Siedentopf PLAN Microscope
with 4 PLAN objectives and darkfield condenser.
Microscopes are beneficial for students who are homeschooled because it enables them to have the same type of exposure to science and experiments as those enrolled in public education institutions.
The first thing you need to decide is what kind of observations your child/student will be expected to view and what kind of experiments he/she will partake in during the school year. Next you will need to decide if it is best to purchase a compound or stereo microscope.
A compound microscope is only useful got looking at slides, which may get rather boring for students, slides must be purchased or made at home, which can be tedious and time consuming. A stereo microscope will enable your student to view live specimens, 3-D objects, and some slide use.
For normal observations, you probably will not need a microscope with a magnification higher than 400X. 400X magnification is generally the highest level students use in most high school courses.
Experiment Ideas:
If you decide to purchase a stereo microscope you can fill a small plastic tray with pond water and have them look through the side of the container with the microscope. If you decide to purchase a compound microscope you can purchase plain slides and cover slips and make your own slides out of vegetable peels, plants, and other transparent 3-D objects.
