![]() The focal length, stated in millimeters, is determined by the distance between this nodal point in the lens and the image sensor in the camera body. I bring this up because when an image is first inverted, the crossing point of the optics is known as a nodal point. Inside the camera, more commonly used in the viewfinder, is a pentaprism or pentamirror (five-sided optical glass element), which allows for the reflex mirror to re invert the image. I want to digress a moment, to discuss when light travels in through your lens, the subject that is being photographed is both laterally and vertically reversed. The focal length is important to know but can be confusing to process, so let’s simplify this subject a bit. By manually adjusting the focus ring it can control where the focus is in the image that is being created. This part of the lens moves and adjusts the positions of the glass inside and changes the distance between the lens and sensor. Towards the top of the lens is the focus ring. If you have a prime or fixed lens then a zoom ring won’t be present for obvious reasons and will simply indicate the focal length on the barrel. On a zoom lens, which will be covered later, the zoom ring allows for the user to change the focal length. As stated, it indicates how far away the lens has focused. In the window on the lens you will see the focusing distance indicator. Moving up is the depth of field scale-the bottom row remains stationary, while the top moves as you focus. ![]() Starting from the part that attaches to the camera body is the lens mount. When It comes to the exterior of the lens, it provides necessary information and controls. Some of the pieces are fixed to the inside of the lens barrel, and some are moveable-each assist in focusing, being able to zoom, etc. Although it cannot be seen, the interior is made up of glass pieces. The lens of a camera is a tool that directs the external light of what you’re shooting onto a digital sensor inside the camera body. Before you start your journey into photography, it’s important to take into consideration the types of images that not only inspire you but to decide what genre or niche of photography you want to focus on.Īs we get into the camera lens guide for beginners, let’s discuss some of the need to know that can aid in the understanding of how the lens works and which can be used to achieve certain images. While the camera body provides the megapixels, controls, light meter, ISO, and shutter release, the lens controls what is being projected onto your camera’s image sensor, the angle of view, the magnification, and much more.Īs you may come to find getting into photography, the web is saturated with information, and choosing a lens for your needs can be intimidating at best. Not only choosing the right lens but choosing a quality lens can help produce high-quality photos for your photographic needs. If there’s anything I’ve learned, it’s all about the lens and less about the camera body that you own. Working in conjunction with the camera is a lens’s purpose in making images. A camera without its lens is rendered useless.
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