
Not long after you buy a DSLR camera, the desire to buy accessories will undoubtedly arise. The first thing people often want is a new lens. As a beginner, it can be hard and sometimes frustrating to pick your next lens. In this post I'm going to take you through what I know about lenses to help you make a decision on what to buy.
The Kit Lens
The lens your camera came with is often referred to as the 'Kit Lens' because it came with the camera body when you purchased it. Most of the time, this is a lens that has the ability to zoom in and out, which gives you a lot of flexibility in what you can shoot with your camera.
You may read advice from a people suggesting you ditch the kit lens as soon as possible. I'm going to caution you against this. To me, it makes the most sense for your hobby, and for your wallet, to get comfortable with what you've got right now and only move up once you're ready.
I also use the kit lens as the inspiration for a mental exercise. I start by figuring out what it does really well and pretend that its the best lens I can get for that particular role. For example, my 18-55mm kit lens has performed very well outdoors and in good sunlight. It's been great for travel photography specifically. Then I think about what situations it hasn't performed very well for me. Shooting conditions such as low light or indoor photography have been disappointing with my kit lens. Knowing these traits, I can focus only on a lens that will help me out in low light and indoor photography.
The Numbers
We're going to use my equipment as an example again. My kit lens is an 18-55mm zoom lens. The 18 refers to the widest (zoomed out) view it can give, and the 55 indicates how zoomed in it will go. To give some perspective on what these numbers really mean, I learned a neat trick to compare these numbers to what your eye can see. Look at a stationary object, and note its size. Then put your camera to your face and look through the viewfinder. Play around with the zoom and notice that the object will "get bigger" or "get smaller" as you slide the zoom around. On my lens, the 50mm mark is just about exactly how my eye sees the world. Anything wider than 50mm gives a wider field of view than my eye does.
Some lenses will have a range such as 18-55mm. Other lenses won't. They'll simply list their focal length as, 35mm, 50mm, 80mm, etc. These are called prime lenses and they do not zoom. To get closer or farther away from a subject, you actually have to move your body. "Whats the point?" you might be asking. Well, prime lenses are often VERY good at the focal length they shoot in. So good in fact, that they'll often blow your zoom capable lens out of the water in terms of picture quality at that focal length. Generally, a zoom capable lens is a great all around lens but a prime lens is the best for its given focal length.
F2.8, F3.5, F1.4, ... What The F?
Along with the focal length (or "zoom") will be another number that usually has an "F" with it. This is how wide open the aperture will go. I haven't discussed aperture yet and I'll get into it further in a later post. For the purposes of this article though, just think of aperture like your eye's pupil. The wider it gets, the more light gets in. When a lens lists its widest aperture number, its telling you just how much light its capable of letting in to your camera body. The aperture can of course be decreased (F number gets higher) but they generally only list how wide it will go.
OK Seriously... Which Lens Do I Buy?
Back to my example. I need a lens that is better in low light conditions. I'm going to go with a lens capable of opening its aperture nice and wide. I also like the idea of a prime lens because I've already got a lens with zoom. I've narrowed my search to a 50mm 1.8 by Canon. 1.8 is how wide the aperture will go, and 50mm is the focal length the lens shoots in. Simple right? Don't worry if it doesn't make sense. The more you read and research (my post shouldn't be the only thing you read) the more these numbers will make sense.
Lets say your desires are completely opposite of mine and you want a lens that's capable of big wide-angle shots. A 10-22mm lens might be a good solution for you. 10mm is the widest angle the camera can shoot at, and 22mm is the closest you can pull in. With this lens you can shoot anywhere between 10 and 22mm.
Thomas You Didn't Help Me
I know. Trust me, you can read everything on the Internet including posts better than mine on places like
Photography On The Net, but you may never feel completely confident in which lens you want next. My advice is to find a way to try out lenses you are interested in. Find out if any of your friends own lenses similar to what you're looking for or rent one to try out for a few days. You read that right, you can rent camera lenses and its a great way to try out new lenses without a huge financial commitment.
The best advice I can give you is to do your homework. There are a lot of resources on the Internet, especially on photography forums and camera manufacturer websites. I got a lot of help by asking questions and reading conversations started by amateurs like myself.
Are you looking for a new lens? Have you already purchased one (or more)? Let me know how your experience was.