After The Kit Lens; Tips On Expanding Your Optical Options
Jon Sienkiewicz, April, 2008
Now that you’ve mastered the standard zoom lens that came with your D-SLR,
you have to be asking yourself “what’s next?” You bought a
D-SLR instead of a compact camera so that you could change lenses. The question
is: which lens to buy first? The answer is easy, but it all depends on what
kind of pictures you like to take.
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Fast, Inexpensive, And A Prime Portrait Lens
Back in the late 1970s and early ’80s nearly every SLR camera was sold
with a 50mm lens. That focal length is considered “normal” for 35mm
film cameras because it’s roughly equal to the diagonal measurement of
the film frame (the actual dimension is closer to 43mm). The lens is compact,
has a large aperture, and sees the world in about the same perspective as the
human eye. It’s also comparatively inexpensive—around $80 (street)
for a 50mm f/1.8.
On a D-SLR, a 50mm lens becomes the equivalent of an 80mm lens (75mm in the
case of Nikon) because the CMOS or CCD sensor is smaller than one frame of 35mm
film. The sensor is generally the same size as one frame of APS film. Although
the effective focal length increases, the f/stop stays the same, so the result
is equal to an 80mm f/1.8 lens—the perfect lens for portraits. The focal
length provides ideal perspective and the large aperture allows you to keep
the depth of field small so as to isolate the subject and separate it from the
out-of-focus background, a traditional portrait technique.
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A
tele-zoom in the 70-210mm range is a great choice if you shoot wildlife
or action sports.
All Photos © 2007, Jon Sienkiewicz, All Rights Reserved |
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The Kitchen Sink
If it’s all-in-one versatility you’re after, consider an 18-200mm
zoom. Tamron offers a relatively compact (3.3”) version that’s available
for less than $400. On a Canon D-SLR it becomes the equivalent of a 28-320mm
zoom. There are, however, a couple of caveats. First, the aperture changes as
you extend the zoom. At 18mm the lens is an f/3.5 but at 200mm it becomes an
f/6.3. Second, you’ll need a tripod or a very steady hand to shoot at
shutter speeds slower than 1/500 sec when you zoom all the way out—but
that’s true about any 320mm lens, not just this one.
On the other hand, the Tamron 18-200mm zoom is incredibly sharp. It’s
convenient to have an 11x zoom in a small, easy-to-carry package. And if that’s
not enough for you, Tamron also offers an 18-250mm zoom (nearly 14x) for around
$100 more.
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A tele-zoom will get
you close to the action.
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Liven up ordinary images
with a creative Lensbaby.
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The Classic 3x/4x Zoom
Telephoto zoom lenses in the 80-200mm or 70-210mm range started becoming popular
about 30 years ago. Purists objected that they were not as sharp as fixed focal
length lenses, but no one could complain about their convenience. Nowadays, computer-designed zoom lenses are just as sharp as their non-zoom brethren.
A 3x zoom in this class is still a very good choice, particularly for shooting
action sports and wildlife. If you want a bit more range, go for the 4x 75-300mm
zoom.
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