Safranin- will stain the colorless gram-negative bacteria pink but does not alter the dark purple color of the gram-positive bacteria. The decolorizer step is most crucial in the Gram stain, because this step involves the removing the color from the … Continue reading →

There is an inbuilt shutter timer, which is mechanical of course. You wind the lever round and when you are ready to start the timer, flip the switch. As long as the camera has been advanced to the next frame, … Continue reading →

The nucleus is the most vital organelle within the cell. It contains the genetic material, the DNA, which is liable for controlling and directing all the activities of the cell. All the RNAs needed for the cell are synthesised within … Continue reading →

Diaphragm or Iris: Many microscopes have a rotating disk under the stage. This diaphragm has different sized holes and is used to vary the intensity and size of the cone of light that is projected upward into the slide. There … Continue reading →

A normal lens, also called a standard lens, is a lens with a focal length between 35mm to 50mm. The focal length of standard lenses are most similar to how the human eye sees the world. Cinematographers often use normal … Continue reading →

If you guessed the larger lens would make the image brighter, you would be correct. The larger lens has more area to collect light, which actually equates to an image more then twice the brightness at a ratio equal to … Continue reading →

How Aperture Affects Exposure. Aperture has several effects on your photographs. One of the most important is the brightness, or exposure, of your images. As aperture changes in size, it alters the overall amount of light that reaches your camera … Continue reading →

Tube: Connects the eyepiece to the objective lenses. Arm: Supports the tube and connects it to the base. Base: The bottom of the microscope, used for support. Which part of the microscope supports the eyepiece? Eyepiece Tube holds the eyepieces … Continue reading →

Quentin Tarantino has an IQ of 160. The famous film director, whose IQ of 160 is the same as physicist Stephen Hawking, dropped out of high school and went on to produce some of the most awarded and brilliant films … Continue reading →

Some lenses converge the light rays whereas some diverge the light rays. The light entering our eyes must be converged at a single point. Therefore, the lens in our eyes must be a converging lens and a convex lens is … Continue reading →

Most SLR cameras use a focal plane shutter. This mechanism is very simple — it basically consists of two “curtains” between the lens and the film. Before you take a picture, the first curtain is closed, so the film won’t … Continue reading →

Bullet security cameras are a type video surveillance camera that is typically small and shaped like a rifle bullet shell or lipstick case. Smaller bullet cameras are typically the diameter of a cigar, but they are shorter. Sometimes they are … Continue reading →

Aperture is like the “pupil” for your camera system, which can open and close to change the amount of light that passes through. Note the nine blades in this lens, which form a diaphragm to block any light that tries … Continue reading →

Nikon Z standard focal length lenses Type of lens Lens Max. aperture Standard zoom Nikon Z 28-75mm f/2.8 f/2.8 Standard Nikon Z 40mm f/2 f/2 Standard Nikon Z 35mm f/1.8 S f/1.8 Standard Nikon Z 50mm f/1.2 S f/1.2 What … Continue reading →

Auto Focus. AF – stands for Auto Focus, which means that the lens can automatically focus through the camera. AF-D – Auto Focus with Distance information. Same as AF, except it can report the distance between the subject and the … Continue reading →