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 →

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 →

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 →

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 →

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 →

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 →

Auto Focus – Silent Wave. Auto Focus – Silent Wave (AF-S) is a type of focusing motor used in a number of AF-Nikkor lenses; the AF-S motor is very fast and quiet. AF-S lenses also have an “A/M” mode selector … Continue reading →

If you are using a 100x objective with immersion oil, just simply wipe the excess oil off the lens with a kimwipe after use. Occasionally dust may build up on the lightly oiled surface so if you wish to completely … Continue reading →

A USB port itself cannot be used as an audio port. You can connect a USB audio device like a headset for obvious reasons. Likewise a USB external audio card works by transfering digital audio data and converting it into … Continue reading →

vibration compensation. The VC (vibration compensation) mechanism is a Tamron development which ensures an effective compensation for camera vibrations. Especially hand-held, low-light and tele photography is susceptible for camera shake and consequent blurred results, due to the required longer shutter … Continue reading →

The 25mm cinema lens standard became a 50-mm normal lens for photography, because it was a reliable lens for completely and sharply filling the frame of a 35-mm photographic negative. Is 50mm lens normal? For a 35mm camera with a … Continue reading →

Basically if you want to get everything in focus, then you are right – you need to be on the F22 side of things (F16, 11, etc.). If you want the background out of focus you need to be at … Continue reading →

Your security cameras can be hacked in several ways. Lack of elementary security features, using default settings and simple passwords, and security camera hack apps all result in cameras and baby monitors, webcams getting hacked. Is it hard to hack … Continue reading →

Connect your iPhone, iPad, or iPod touch to a display: Plug your Digital AV or VGA adapter into the charging port on the bottom of your iOS device. Connect an HDMI or VGA cable to your adapter. Connect the other … Continue reading →

T3 offers better value than T2, including extra CPU credits and better baseline performance, faster CPUs. The downside is the migration effort. The cost difference of the instance types between Windows and Linux is considerable and results in different optimal … Continue reading →