Whether you are an amateur or a professional photographer, you have certainly faced the question of how to choose which camera lens to buy ? When choosing your photo lens you need to consider four important things: focal length, maximal opening of the diaphragm, and stabilization, and the speed of focusing.
How to choose which camera lens to buy according to the focal length
Here are two categories of focal length:
Focal length is the distance between the optical center of the lens and the focal spot of the image. It is always expressed in millimeters.
To know the focal length look at the figures marked in millimeters on
the lens you want to buy. So find out if the focal length is fixed or variable. On a variable focal length you will have to look at the first and last digits, for example 24-105mm.
You can opt for a fixed lens that offers better quality and is lighter. It will not let you zoom in or out, but will allow you to take beautiful portraits.
How to choose which camera lens to buy according to the opening
As with focal lengths, the opening can be variable or fixed. The opening is the maximal brightness of the lens when the diaphragm is fully open.
The opening figures are also marked on the lens or at the ring. Generally on entry-level lenses the opening figure is written in two digits, e.g. 1:3.5-5.6. This means that the lens has a maximal opening of 3.5 when the zoom is in and a maximal opening of 5.6 when the zoom is out.
The lower the number, the brighter the lens. A light lens serves two purposes: in a first time it allows much more light to enter the lens, which is a big advantage for photography indoors, then in a second time it makes background blurring easier. The lower the number, the more easily you will get a background blur.
High-end variable focal length lenses offer constant opening regardless of the focal length used. It is a complex and expensive technology, but it gives the photographer a great deal of flexibility. If you have sufficient financial means, it is preferable to acquire this type of lens.
Choose your lens based on the image stabilizer
Which camera lens to buy: The stabilizer of a lens allows to stabilize micromovements during capturing. With this indication you can determine which lens to choose to gain stability, especially if you don’t have a tripod.
You can tell if a stabilizer is present on your lens through the abbreviation VR (Vibration Reduction) on Nikon, IS (Image Stabilizer) on Canon, VC (Vibration Compensation) on Tamron, and OS (Optical Stabilizer) on Sigma lenses.
Choose your lens based on focus “which camera lens to buy“
The lens is equipped with a minimal focal distance. Therefore It is not possible to focus below this distance.
It is the autofocus (AF) system that allows this focus. When deciding which lens to choose, you should first acquire a lens with an ultrasonic motor autofocus. They offer fast and quiet focus.
How to choose your lens according to the intended use
Which lens to choose between a wide angle, a 50mm, and a telephoto lens? It depends on the use you intend to make of it. In general:
Now you know which camera lens to buy.
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Have a nice photoshoot!
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