The first thing you need to decide on the purchase or going to use a lens if you want a zoom lens or a prime target. That is, a lens with a single fixed focal length. Zoom lenses may seem the obvious choice for many, as you have all the different focal lengths, which covers in-and-the-same objective one. It 's very flexible and you do not have to carry extra lenses and hassle of switching from one target to another. Would captures the majestic landscape? Zoom out and click. Do you want to capture the expression someone's face? Zoom in and click. These are certainly great advantages over the first lens, where you're stuck with the same focal length. But prime lenses have their advantages. In general, smaller, faster, cheaper, sharper, have less distortion and are less prone to damage than zoom lenses. It is worth considering suddenly are not? Let's take a closer look at the numbers first.
A fastSlower, you say?
prime lenses do not use as many lenses (glass plates), to make them as zoom lenses. And this is the key buildings are smaller and therefore easier and cheaper. Now, what is this history of being the prime numbers in a hurry? It 's still a piece of glass, right? Not a race car! Well, when photographers talk about a goal of being fast, it's actually a bit 'of nonsense. What should be said is that the lens has a large opening that allowsmore light to pass through the lens, allowing the camera to nail the correct exposure faster. It 's just easier to say that' the objective is fast! '. Using one of these 'fast lens' provides some additional capabilities. You can freeze and easier to capture the action situations with high speed (large aperture and short shutter speed) and you can easily take pictures by hand in low light conditions (larger aperture and shutter speed). Just note that when you are using a largeopening, the zone of sharpness (the 'depth of field') becomes smaller. Things in front of a behind the focal point will be made fuzzy. This is not necessarily a bad thing, however, can help to draw attention to the main subject of the picture and away from any underlying disorder. The larger the aperture and focal length you are using larger, the smaller the area of focus will be.
But back to the first lenses to be simple structures, their other advantages I mentioned above weretheir superior sharpness and less distortion. In particular, the sharpness can be useful if you intend to send a photo stock agency. Sell 10 to 20 mega pixel photos require excellent performance from your goal.
And finally, why can not the first zoom lens, there is one less thing that can break!
Choice of zoom and the first is not always so simple. Also, some people believe that the fixed focal length primes, while other forces them to findliberating to have one less thing to think about. Personally, I use both zoom and prime. When I'm in a rapidly evolving situation, with things happening around me, I prefer the flexibility of the zoom. But when I go on a roll with a particular phrase in mind, I prefer to use the appropriate goal or along the first width.
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