LOW-TECH LOW LIGHT
By MICHAEL PERKINS
LIGHT IS THE PRINCIPAL FUEL OF PHOTOGRAPHY, but it needs refinement, just as crude oil needs to be industrially altered before it’s ready for consumer use. It isn’t just enough to record light in its natural form; it has to be corralled, directed, harnessed so that it enhances a photograph in such a way that, ironically, makes it look like you did nothing at all but press the shutter. So, right at the start, making images is a bit of a con job. Good thing is, it’s only dishonorable when you get caught.
Doing macro on the cheap with the use of screw-on magnifying diopters ahead of your regular lens is one of the situations that can create special lighting challenges. There is an incredibly shallow depth of field in these lenses, but if you compensate for it in the camera, by, say, f/8 or higher, you lose light like crazy. Slow down your shutter to compensate, and you’re on a tripod, since the slightest tremor in a hand-held shot looks like 7.8 on the Richter scale. Keep the shorter shutter speed, though, and you’re jacking ISO up, inviting excessive noise. Flood the shot with constant light, and you might alter the color relationships in a naturally lit object, effecting, well, everything that might appeal in a macro shot.
Best thing is, since you’re shooting such a small object, you don’t need all that much of a fix. In the above shot, for example, the garlic bulb was on a counter about two feet from a window which is pretty softened to start with. That gave me the illumination I needed on the top and back of the bulb, but the side facing me was in nearly complete shadow. I just needed the smallest bit of slight light to retrieve some detail and make the light seem to “wrap” around the bulb.
Cheap fix; half a sheet of blank typing paper from my printer’s feed tray, which was right next door. Camera in right hand, paper in left hand, catching just enough window light to bounce back onto the front of the garlic. A few tries to get the light where I wanted it without any flares. The paper’s flat finish gave me even more softening of the already quiet window light, so the result looked reasonably natural.
Again, in photography, we’re shoving light around all the time, acting as if we just walked into perfect conditions by dumb luck. Yeah, it’s fakery, but, as I say, just don’t get caught.