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 →

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 →

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 →

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 →

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 →

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 →

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 →

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 →

There is some dirt or something on the electronic connectors between the lens and the camera body. The lens has an Aperture Lock switch set to the ‘Locked’ position. Without knowing the camera make/model and lens make/model, it’s impossible to … Continue reading →

Good question – and many answers exist, but it is Canon’s professional line (though used extensively by non-professionals) of EOS EF autofocus 35mm SLR and DSLR still camera lenses. Some say L stands for “Low Dispersion” – achieved by the … Continue reading →

42 Steps to the Perfect Canon EOS RP Setup Open the box, find the battery, place it in the charger and plug it in. While the battery is charging, unpack the other items you want from the box. Download and … Continue reading →

When viewing any slide with a microscope, a small square or circle of thin glass called a coverslip is placed over the specimen. It protects the microscope and prevents the slide from drying out when it’s being examined. The coverslip … Continue reading →

From prime to zoom, these are the best lenses for your DSLR or mirrorless camera. Canon EF 28mm f/2.8 IS USM Wide Angle Lens (Used) Sony SEL28F20 FE 28mm f/2-22 Standard-Prime Lens. Rokinon DS50M-NEX 50 mm Full Frame Cine Wide … Continue reading →

Presbyopia can be managed with glasses, contact lenses, or surgery. This defect is usually corrected by using glasses with bifocal power of suitable focal lengths. How do you rectify presbyopia questions? Presbyopia, which is a special kind of hypermetropia, can … Continue reading →

Answer: Once you start wearing your prescription glasses, you may find that your vision is so much clearer that you want to wear them all the time. If you are comfortable, then there is absolutely no reason why you can’t … Continue reading →