2024 Author: Sierra Becker | [email protected]. Last modified: 2024-02-26 03:46
Today, before buying optics, many are interested in the question of how to check the lens when buying. Indeed, this process should be taken seriously. For each camera system and brand, there are dozens of different lens options on the market, ranging from a modest $50 to $10,000 (example: Canon telephoto lens).
Finding out your needs is the first step to buying lenses. You need to clearly decide what you will shoot. Ask yourself questions like the following… - Should I shoot indoors or outdoors? - Should I take photos of fast moving subjects (such as sports)? - Do I want to shoot portraits or do a wedding? - Do I like shooting wild animals and nature? - Take pictures of landscapes, interiors or architecture? These are the questions you need to ask yourself and decide on your own budget. If you plan to purchase a digital reflex (DSLR), then as part of the kit, you will already have a main lens that makespretty good photos. However, the main attraction of this type of camera is the ability to switch lenses to get the best shot in any situation. An important question: how do you find the right choice for your needs?
Understanding glass
Before you check a lens when buying, you should understand what one lens does and how it differs from another, first of all, you need to be familiar with a few basic concepts.
Focal length, technically speaking, is the focal length of a lens, expressed in millimeters, which is the distance between the rear lens of the lens to the focal plane where parallel light rays hitting the lens converge to a point. This matters to you because the focal length determines the angle of view of the lens. The shorter the focal length, the wider the field of view of the camera. As the focal length increases, the field of view narrows, so you get a smaller view of objects that looks larger in relation to the environment. In the world of traditional 35mm film, focal lengths between 16mm and 35mm are generally considered wide angle. A 50mm lens is called "normal" because these lenses are very close to what the human eye sees, and anything over 100mm is considered telephoto. However, focal length is a little tricky when it comes to DSLRs. This is because image camera sensors are smaller than 35mm film, so they cut off part of the image and give the effectlonger focal length. To get an idea of how this discrepancy will affect the angle of view of the lens, one has to multiply the crop of a digital camera. The Nikon D40, for example, has a crop factor of 1.5x. As a result, a 35mm lens has a field of view equivalent to 52mm when placed on a D40.
Aperture
Another key component of how to check a lens when buying is aperture. This hole is one of the mechanisms that controls the amount of light that passes through the image sensor lens.
Aperture is usually referred to in terms of the F-stop, and represents a range such as f/2.8. The lower the number, the larger the hole, and the more light enters the camera. A camera lens that opens with a wide aperture allows you to maintain a faster shutter speed in low light conditions. This can be essential for getting a sharp image from a handheld camera. Wider openings also allow for more creative freedom, giving you the ability to throw out-of-focus backgrounds. Before you check the lens upon purchase, consult well with understanding people, as store employees are not always competent in these matters. This way you can save your time and money.
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