Choosing The Right Lens By Mark Eden
There is a dizzying array of choices when it comes to choosing lenses for
SLR cameras. From wide angle to telephoto, zoom to prime lenses, fish eye,
fast lenses, wide aperture lenses, the choice seems to be impossible. It's
not really. What it comes down to is asking yourself a simple question:
What do I want to shoot? Different Lenses for Different Subjects If you
are just beginning in photography, chances are you are still experimenting
and finding out what you like to shoot. You might shoot a few family
portraits one day and landscapes from your holidays the next. On the other
hand, you may have decided right from the start that you love taking
photos of wild animals and this is all you want to do. Either way, the
lenses required to get the best out of these subjects differ greatly. To
fit an expansive landscape image into your viewfinder, you would need a
wide angle lens. However, trying to take a portrait with the same lens
would result in a tiny little person and not much else in the frame unless
you are right in that person's face and smelling their breath. While
trying to take a picture of a wild bear from 100 or more meters away is
just impossible (and you really don't want to get any closer to a wild
bear). In a perfect world you would have 3 different lenses for each of
these subjects. But in a perfect world you'd also be a millionaire and be
able to afford them all. So the thing to do is to decide what type of
photography interests you and choose your lenses accordingly. Length: Zoom
versus Prime There are benefits to using both zoom lenses and prime (fixed
or non zoom) lenses. On one hand, zoom lenses are versatile, and reduce
the need for a whole bag full of lenses that you need to change and change
again while you are out shooting. On the other hand, a good quality prime
lens can be gold. Prime lenses, if they are well built, generally produce
a crisper, better quality image. This is because they have fewer pieces of
glass and moveable parts. Therefore the light coming in doesn't need to
pass through as many objects and so is less diffused. The other great
advantage of prime lenses is that because of this, they tend to be
"faster" than zoom lenses. Practically, this means that you can use slower
shutter speeds as the lens needs less light to create a correct exposure.
This is especially useful if you want to take portraits with available
light. Aperture Another important factor to consider when choosing your
lens is its maximum aperture. This is indicated in the description by an f
symbol. Eg. f/2.8. The lower this number, the wider your aperture choices.
For example, if you want to take a portrait with only your subject's
facial features in focus, you would use a wide aperture. If you want to
take a sweeping landscape where everything needs to be in focus you would
use a narrow (high number) aperture. Selecting a lens with a wider
aperture gives you more options when out shooting. It is well known that
lenses can cost as much, or more, than cameras themselves. It is also
worth noting that with lenses you get what you pay for. While no piece of
equipment can singularly make the difference between a good photo and a
bad one, a well built lens using quality glass, can lead to sharper
pictures. Therefore it is worth considering the lenses you buy carefully
and investing in the best quality you can afford. Knowing what sort of
photography you want to pursue can make this process a whole lot less
daunting and more cost effective.
Mark Eden is a freelance
travel photographer and writer, and the founder and director of
Expanse Photography, a photographic services company offering fine art,
limited
edition prints as well as stock and assignment photography and
publishing services. Mark can be contacted through the Expanse Photography
website http://www.expansephotography.com.
Source:www.isnare.com