100x objective. The Oil immersion technique is used in order to enhance resolution. This requires a special 100x objective. Can you use immersion oil with 40x objective? d. Never turn your nosepiece back to the 40x objective when using oil … Continue reading →

The length of decolorization is a critical step in gram staining as prolonged exposure to a decolorizing agent can remove all the stains from both types of bacteria. The final step in gram staining is to use basic fuchsin stain … Continue reading →

Add Gram’s iodine for 1 minute- this is a mordant, or an agent that fixes the crystal violet to the bacterial cell wall. Rinse sample/slide with acetone or alcohol for ~3 seconds and rinse with a gentle stream of water. … Continue reading →

Solution. AF-assist beam firing. Enables or disables the EOS-dedicated Speedlite’s AF-assist beam. ON: Enable. The external Speedlite emits the AFassist beam when necessary. What is autofocus assist beam? One camera and flash feature that helps with shooting sharp photos in … Continue reading →

Focal lengths and lenses used by great directors S. No. Director Focal length, Lens 8 Martin Scorsese 25mm and wider, 32mm (The King of Comedy), long lenses for Raging Bull 9 Joel and Ethan Coen 27 and 32mm (Stays between … Continue reading →

Condenser is used to collect and focus the light from the illuminator on to the specimen. It is located under the stage often in conjunction with an iris diaphragm. Iris Diaphragm controls the amount of light reaching the specimen. It … Continue reading →

Polycarbonate plastic. Polycarbonate plastic has an index of refraction of 1.586, a specific gravity of 1.20, and is very impact resistant. This allows lenses to be thinner, lighter, and much more impact resistant than CR-39. Polycarbonate is considered the best … Continue reading →

For deep-sky astrophotography, your ISO levels should generally be set high and support your other exposure settings. For some, 800 or 1600 works in bringing out the moon and stars during long-exposure shots of dark night skies. Is higher ISO … Continue reading →

How do you clean a dirty slide? You’ll have to gently remove the slides from their casing and wipe them with isopropyl alcohol. After you wipe them down, you’ll want to leave them in a room with low humidity to … Continue reading →

Do Not Forget About Your Contact Lens Case Regularly rinse it with sterile contact lens solution and never with tap water. Leave the empty case open and let it air dry. Experts recommend replacing it for three months and immediately … Continue reading →

Back Focal Length – A mechanical measurement given as the distance between the last surface of an optical lens to its image plane. How do you calculate back focal length? The distance from the second lens to the focal point … Continue reading →

Measure Of Image Quality Resolution is determined by the ratio of pixels in proportion to image size. This is measured in PPI (Pixels Per Inch). A high resolution image will usually have more pixels to every square inch in an … Continue reading →

Best beginner camera lens. The 50mm is by far the most popular starter lens, as it strikes a nice balance between field of view and depth of field, and doesn’t require any tinkering with focal length to produce a crisp … Continue reading →

7.92×57mm. 98/48, Yugo K98k) was a refurbished bolt-action rifle, chambered for the 7.92×57mm Mauser, a cartridge that was temporary adopted in the years after World War II by the Yugoslav People’s Army. What ammo does a Yugo M48 Mauser take? … Continue reading →

Advantages for Security Cameras Pros 1: Deter Crime. Pros 2: Monitor Scenarios and Activities. Pros 3: Gather Evidence. Pros 4: Arrive at the Right Decisions. Pros 5: Maintain Records. Cons 1: Privacy Is an Issue. Cons 2: It Can be … Continue reading →