How to choice a lens 如何选择镜头 Choosing a Lens At first glance this seems a simple task, but you will be faced with lots of options and questions. Choose a good supplier. You will be better off talking to suppliers that design their own lenses, even if you only need an off the ...
The basic technology that makes all of this possible is fairly simple. A still film camera is made of three basic elements: an optical element (the lens), a chemical element (the film) and a mechanical element (the camera body itself). As we'll see, the only trick to photography is c...
Magnify a part of a photo: Take a picture in the app and view it. Zoom in or out to a part of the photo if needed. Tip Want to magnify your iPhone screen? You can use a magnification feature called Zoom. The tool enlarges the text, images, and icons. Go to Settings > Accessibil...
The higher the refractive index of a material, the slower light moves through it, which results in greater bending (refracting) of the light rays. So the higher the refractive index of a lens material, the less lens material is required to bend light to the same degree as a lens with a...
you'll see a camera-like interface at the bottom of the screen, but with some unique features. The slider controls the magnification of the scene in the lens frame, while the button at the bottom left turns on the flashlight so you can illuminate it. The padlock button next to that loc...
First, the farther you move the lens away from your camera, the closer you’ll need to get to your subject in order to capture a sharp image. In other words, when you pull away the lens, you’ll obtain greater magnifications (which is great for macro photography, but not so great wh...
entirely. Switch your lens over tomanual focus, then carefully turn your lens’s focus ring until you’ve achieved perfect sharpness. (For even better results, use your camera’s Live View mode to preview the image on the rear LCD and zoom in to check the focus at a high magnification....
Using a telescope for astrophotography allows you to capture stunningly detailed images of celestial objects, but it requires more specialized equipment than standard photography. To achieve the best results, select a telescope with a large aperture and high magnification to gather more light and reveal...
Examine the magnification knob. Some dissecting scopes will have total magnification written on the magnification knob so that you will not need to do multiplication to determine it. Step 2 Check the eyepiece, or ocular lens, to see that it has a magnification of 10x. Although a 10x magnificat...
Magnification Adjustment:On variable power scopes, this mechanism adjusts the magnification power of the scope. Scope Body:The main part of the scope to which the other parts attach and the tube through which you look when aiming. Turrets:Turrets are knobs on the scope used to adjust elevation...