With myopia, your prescription for glasses or contact lenses is a negative number, such as -3.00. The higher the number, the stronger your lenses will be. The prescription helps the eye focus light on the retina, clearing up your distance … Continue reading →

A mechanical stage is a mechanism mounted on the stage that holds and moves the microscope slide. It has two knobs and allows the user to move the slide in the X or Y direction very smoothly and slowly by … Continue reading →

If you’ve acquired an older, second-hand DSLR—especially if it seems like a professional camera—it might be full-frame. Some of the most popular models of the last decade or so are: Canon 5D, 5D Mk II, 5D Mk III, 5D Mk … Continue reading →

What is the difference between Magnification and Resolving Power? Magnification gives how many times the image has been magnified by the instrument. Resolving power gives the ability to separate between two closely placed objects. The resolving power is the quality … Continue reading →

10x lens. The most frequently used objective lens is the 10x lens, which gives a final magnification of 100x with a 10x ocular lens. What type of microscope is most used in the laboratory? Applications of laboratory microscopes Upright microscopes … Continue reading →

Filter size does not determine image quality. However, generally the lenses with the highest image quality are also the fastest lenses available which requires a larger diameter and hence larger filter sizes. Does filter size matter? All elements are not … Continue reading →

The lens is made of transparent proteins called crystallins. The average concentration of lens proteins is about twice than that of other intracellular proteins and is thought to play a structural role in the lens. What cells make up the … Continue reading →

You can usually tell if dry eyes are the reason your lenses are blurry by blinking. If your vision gets a little better, you know that’s why. Fortunately, there is a simple solution. Using artificial tears or rewetting eye drops … Continue reading →

How to focus manually – top 20 tips Practice. Most of us are used to powering up our camera, composing the shot, then pressing the shutter release to get a sharp image. Set the diopter. Look for light. Use live … Continue reading →

two lenses. The basic refracting telescope has two lenses. The first lens is called the objective lens. This lens is a convex lens that bends the incoming light rays to a focal point within the telescope. The second lens is … Continue reading →

Stage Clips: Clips on the stage used to hold the microscope slide in place. On student compound microscopes many times the stage clips can be removed and replaced with a mechanical stage. What are the clips for on the stage? … Continue reading →

Rounded diaphragm blades are designed to create a more circular opening in the lens aperture mechanism. The quality of the bokeh (out of focus area of an image), when taken with a lens with rounded diaphragm blades, is smoother and … Continue reading →

On a full-frame camera, at focal length 200mm, the diagonal angle-of-view is about 12 degrees. At 300mm, it is about 8 degrees. In other words, at 300mm, the image captures a narrower part of the scene compared to at 200mm. … Continue reading →

Always place the 4X objective over the stage and be sure the stage is at its lowest position before putting the microscope away. When you put the microscope away which lens should be in the viewing position? The 4x objective … Continue reading →