Tuesday, February 25, 2014
The Versatility Of A Telephoto
Whether photographing wildlife or landscapes, long lenses are great tools for more than just zooming
Another great application for telephoto lenses is isolating an element in a scene and making it the sole feature of an image. Standing in the Merced River in Yosemite photographing these great rime ice mounds with El Capitan and Half Dome in the background, I used a 17-35mm wide-angle lens focused very close to the mounds to make them the key element of the image. When finished, I stood up and looked all around for other subjects, smaller and less grand, but equally interesting. (I recommend you do this no matter what you're photographing.) A dead, but beautiful, black oak leaf hanging on a nearby tree caught my eye. A small ray of light hit the leaf, highlighting the rime ice crystals along its edges. Rime ice was still my key element, but with a totally different perspective. I used my 70-300mm lens at 250mm to isolate the leaf and frame the image with as little background as possible. I was several feet from the leaf so I could use a shallow depth of field, ƒ/5.6, to blur the background, but keep the subject in apparent sharp focus. Telephoto lenses have much shallower depth of field for a given ƒ-stop than a wide-angle. You can use this to help blur backgrounds and intrusive elements. But, remember, unless you're isolating/featuring a specific element like the leaf, as you increase magnification, you may have to increase your aperture to give you enough apparent depth of field to make the whole scene appear in focus. Use your depth-of-field preview or camera monitor at 100% to check sharpness.
Telephoto lenses can help you create sequences that tell a story. Consider Angel Falls in Canaima National Park in Venezuela. After hiking a mile to the overlook for the falls, you're still a mile away, so even though almost 3,000 feet high, you still need 60-70mm to capture the full height of the falls and not have them look miniscule in your photo. A lightweight, cover-all-bases lens like the 28-300mm zoom from Nikon or an equivalent range from other manufacturers is perfect for hiking in the tough, humid, rain-forest conditions. You can use one lens like this to tell a story of your Angel Falls expedition.
From the drop-off point for the mile hike in, with the falls peaking above the rain forest, a 200mm lens setting allows you to capture the DC-3 that dropped you off as it flies above the falls. Use the wide-angle end of the range to capture rain-forest landscapes on the way to the falls. Use the 60-70mm range to capture the full height of the falls. Use the 150-300mm range of the lens to isolate sections of the falls. A telephoto lens can also help with perspective. A photographer in our group made the one-mile trek from the overlook to the base of the falls. From the overlook, I zoomed in to capture the base of the falls and incorporated him into the lower-left area of the compressed composition to highlight the perspective of the true size and scale of this magnificent waterfall. A wide-angle would have exaggerated the same foreground subject into unrealistic proportions.
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