If an upright image is needed, Galileo’s arrangement in Figure 1a can be used. But a more common arrangement is to use a third convex lens as an eyepiece, increasing the distance between the first two and inverting the image … Continue reading →

2. The psychoanalytic critical lens is exactly what it sounds like; it is an analysis of a literary work through the several psychological views developed by experts such as Freud and Lacan over its history. Analyzing a work through this … Continue reading →

The Canon EF 50mm f/1.8 II Lens’ strongest quality is its sharpness. Sharpness performance wide open (f/1.8) is decent, but the Canon 50 f/1.8 is very sharp at f/2.8 and beyond. It is slightly sharper than even the Canon EF … Continue reading →

Low power objectives cover a wide field of view and they are useful for examining large specimens or surveying many smaller specimens. This objective is useful for aligning the microscope. The power for the low objective is 10X. Place one … Continue reading →

To achieve bokeh in an image, you need to use a fast lens—the faster the better. You’ll want to use a lens with at least an f/2.8 aperture, with faster apertures of f/2, f/1.8 or f/1.4 being ideal. Many photographers … Continue reading →

The good thing about astigmatism is that it can be corrected with the right prescription eyewear. Eyeglasses are one popular option, but if you’re someone who prefers contacts, then your eye doctor will prescribe one of three types of contact … Continue reading →

Navigate to Edit > Preferences (Win) or Lightroom Classic > Preferences (macOS). Select the Presets tab from the Preferences dialog box. Select Override master settings for specific cameras under Raw Defaults. Select a camera model from the Camera drop-down. How … Continue reading →

The aperture size also influences the sharpness of the image. With a large aperture size, the image is unclear because too many light rays from each point reach the paper, spreading the image and causing blurring. What is the effect … Continue reading →

How do you clean a 100x microscope lens? 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 … Continue reading →

USB-C. USB-C is a highly versatile connection. It can be used to transfer files, connect peripherals like high-speed storage drives, displays, and more. One key feature of USB-C that is used widely on modern smartphones is audio transmission. Which USB … Continue reading →

Sometimes the filter ring size is marked on the front of the lens. If a filter is fitted, then the filter will usually have its size printed on the side somewhere. If you can’t find the filter size marked on … Continue reading →

In theory you could use any lens you want but the general rule of thumb for Star Trails photography is to use a wider field of view lens (35mm or wider) to capture more of the nighttime sky. Additionally, having … Continue reading →

Unfortunately, Apple’s iPhone doesn’t have a changeable aperture setting built in to the camera app. But don’t despair! It can be done—or at least, the shallow depth of field effect can be achieved using an iPhone. How do I get … Continue reading →

The main difference between the two brands is the autofocus. With Canon, all the EOS lenses have autofocus. Meanwhile, only Nikon AF-S lenses have autofocus. It is also worth noting that even non-AF-S lenses still work on Nikon DSLRs. Which … Continue reading →

What is the function of Safranin? Used to stain the Gram-negative cell walls since they lost the primary dye during decolorization. What is the purpose of safranin in Gram staining? The safranin is also used as a counter-stain in Gram’s … Continue reading →