SOFT AND SHALLOW
By MICHAEL PERKINS
IN RECENT YEARS THERE HAS BEEN A MOMENTOUS SURGE in the number of photographic optics that market themselves as “art lenses”, as if all other lenses were, what….non-artistic? This murky term essentially denotes lenses that deliver customized or selective focal effects, such as the Lensbaby “sweet spot”, a partial area of sharpness, surrounded by soft blur, that can be placed, at will, at various parts of the frame. Other so-called “art lenses” produce unique patterns of bokeh, or blur artifacts, while yet others produce vignetting, or darkening around the outside corners of the image. Some of these lenses are great overall performers, while a number of them are either one-trick ponies or muy espensivo or both.
Thing is, if you possess a fast “normal” lens, such as a 35 or 50mm “prime”, you can already achieve some of the same effects of many over-hyped proprietary lenses in the “art” arsenal. Primes have but a single focal length and thus have no telephoto function. The photographer frames by physically moving closer to, or farther away from, his subject, by, in effect, “zooming with the feet”. Since their focal range is fixed, primes are extremely simple in their construction, and therefore extremely sharp. In addition, they often will open to at least f/2.8, with many rated at f/1.8 or even faster. And that’s where the arty focus fun starts.
Wide open to f/1.8, the 50mm prime used for this image creates an extremely shallow depth of field. And that can be good news for flattering pics of faces. Primes of this focal length are already prized as portrait lenses, since they produce faces with normal proportions, as opposed to the Silly Putty stretching you get with wide-angles. Add to that a fast prime’s ability to deliver a very buttery transition between sharpness and blur, and you have the potential for a very finely-tuned look. Notice that there is no real hard sharpness in the cat’s face beyond one eye and about one third of his face. The rest rolls off very softly. My point is that nearly any good prime can deliver this effect: it isn’t essential to invest in a custom piece of “art” glass to get it.
One caveat: shooting this far open, at this distance, your auto-focus may endlessly gyrate back and forth trying to find a place to lock in. My advice: go manual. At this DOF, you’ll have to practice with how to nail the focus, and I personally am driven bonkers trying to find the sharpness at f/1.4 or faster: the range is so very razor-thin. Even so, before you pony up for a lens that’s designed to deliver arty focus, play with the primes you already have. You may be delighted. The focus may be shallow, but the satisfaction can run deep.
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