Many citizens have an interchangeable-lens camera - a popular SLR or a less popular digital model. This lens offers quite a few possibilities for photography, and you don't have to change to a better model.
However, many still decide to buy 1 more, additional. And this is where the questions begin, especially for novice photographers: which lens to choose? A way out of the situation can be a visit to the online store visionmachines.ru. There are various types of optics, such as a machine vision camera, there are also optics for cameras.
Focal length - in simplified terms, refers to the magnification offered by this lens. The smaller it is, the lower the magnification and the larger the angle of view of the lens. Cameras, by the way, can be industrial. An example would be the basler of a camera.
Zoom - "fixed focus"
Zoom is an indicator that allows you to change the focal length. The lens has a ring that you can twist. This leads to a change in focal length, say, from 24 mm to 50 mm. The range of possible changes is determined by the type of lens, for example, 18-105 mm or 24-70 mm, etc. The advantages of this type of lens: improved brightness, low price, lighter weight, good optical parameters - less distortion.
Brightness - in other words, a measure of light. The lower this property, the more light rays fall on the sensor. The brighter the image is produced by the optics, the more detail it will display in low light. Bright lenses give you the ability to set short exposure times. Telecentric lenses form a separate category .
An important aspect to look out for is the built-in image stabilization in the lens. It is a mechanism that compensates for vibrations by making micromovements and eliminating them. Usually stabilization improves the lens's performance.
Each brand comes up with a separate system for attaching the lens to the device. When purchasing a lens, it is necessary to take into account which mounts the manufacturer uses, and which optics should be purchased for them. Later, when you decide to change your camera, for example from Canon to Nikon, all the parts you have collected must be replaced.
Of course, you can use adapters, but this could be due to loss of image quality or lack of communication between the lens and the camera and the need to manually adjust the sharpness and other parameters.
Sharpness is how clearly the lens reflects the picture. It is difficult to call this a disadvantage when the lens has increased sharpness parameters. But often, such lenses create a fuzzy picture. Most optical defects are automatically corrected when shooting in JPG format. When creating such a format, the camera imposes the appropriate changes that correct the listed shortcomings. The choice of focal length is one of the most important issues when choosing a lens or a set of lenses. If the photographer enjoys landscape photography, he is better off using a wide-angle lens.
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