Coarse Adjustment Knob– The coarse adjustment knob located on the arm of the microscope moves the stage up and down to bring the specimen into focus. What holds the slide and moves up and down? Stage clips hold the slides … Continue reading →

So, never take the lens off unless it is to change it with another one immediately, and possibly do it in a clean place. And never carry around your camera with the plastic body cap on it, because that Will … Continue reading →

Both multi-purpose solutions are designed to keep your contact lenses effectively clean as Biotrue has a dual disinfection system, compared to ReNu which has a triple disinfection system. Biotrue contact lens solution are more advance in that they deliver an … Continue reading →

THE LENSES Two lenses are needed to build a telescope. We call these the “objective” lens and the “eyepiece” lens. The “Objective” lens should always be a convex lens. What 2 types of lenses are used in a telescope? This … Continue reading →

It has been defined as diagnostic criteria for hematuria that 5 or more red blood cells/HPF(high-power field, χ 400) in the urinary sediment sample under microscopy and/or 20 or more red blood cells/µL by using flow cytometry technique with non-centrifuged … Continue reading →

Early telescopes focused light using pieces of curved, clear glass, called lenses. However, most telescopes today use curved mirrors to gather light from the night sky. The shape of the mirror or lens in a telescope concentrates light. That light … 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 →

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 →

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 →

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 →

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 →

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 →

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 →