Photo purchased from … www.depositphotos.com
Photographs in your custom printing work are essentially a record of the light you witnessed. You are creating with light, making a specific artistic and/or editorial statement. Photos are never added to a publication just for their appearance.
In this light (so to speak), it is helpful to understand some terms and definitions. These will help you either take photos or select photos for the projects you design, whether brochures, banners, or print books.
Depth of Field
For the first ten years of my forty-six years (to date) in graphic design and other aspects of publications management, I shot the photos I used in my graphic design work. I used a film camera, not a digital camera, so you will need to do some online research to apply this information to digital photography.
“Depth of field” identifies the part of a photo that is in perfect, crisp focus and the part of the photo that is a little bit fuzzy. It notes the range (or depth into the picture plane) of crystal clarity, assuming all photos have a foreground, middle ground, and background.
If you are working in bright light (outdoors, for instance, photographing a group of flowers), you can set the lens aperture at a higher number (say f/ 16, or “f-stop” 16), which closes down the adjustable “screen” covering the camera lens in just the same way as the pupil in your eye closes to protect your vision in bright light.
This not only allows less light into the light sensor of the digital camera (or onto the film), but it also allows certain parts of the photo (depths into the picture plane, as noted above) to be in sharp focus or out of focus.
Why would you want to do this? Because it allows you to select the part of the photo you want the viewer to focus on, the subject of the photo, while ignoring or giving less attention to other parts of the photo.
If you’re photographing a bed of flowers (to reference the example noted above), you can highlight one flower and make those flowers closer to the viewer and those farther away less prominent, since they will be out of focus. You can also do this when photographing a person, a model.
From a mathematical point of view, the more closed down the lens can be (to allow less light to enter), the more inclusive the sharp focus will be (the larger the area from crisp focus in the foreground to crisp focus deeper into the background). For example, in this case the camera lens setting might be f/ 16 or greater (maybe even f/ 32). This, of course, requires more light, either natural ambient light or light from an electronic flash.
Going in the opposite direction and lessening the depth of field would require you to “open” the lens more (as the pupil of your eye opens more in lower lighting). An open lens (perhaps f/ 1.2) would make the area of crisp focus (which you could change the position of, within the picture plane, using the focusing control of the camera) be less deep.
High-Key and Low-Key Photos, and Contrast in Photos
Photos make a statement of some kind. Depth of field allows you as the photographer to choose what your viewer will look at. Other tools will do the same or similar things, even leading your viewer to feel a certain way about a photo in a print book or other publication.
In this light here are some terms to consider.
A “high-key” photo is one with predominantly light areas (or white or lighter toned pixels when viewed as a “histogram” graph in an image editing program like Photoshop). To the eye, such a photo just looks very white or bright, if it is either in black and white or color. This can suggest the bright, pristine white of early morning sunlight, for instance. The opposite is a “low-key” photo (in which the Photoshop histogram leans toward the darker tones). This might suggest the more subdued feel associated with sunset.
Closely related to this is the range from high contrast to low contrast within a photo. At noon, the sun casts intense shadows. A photo of a rock outcropping in the mountains, for instance, will have deep shadows and almost completely white highlights. It will be of high contrast. You can do the same thing indoors with an electronic flash (or multiple electronic flashes), with the deep shadows making a man’s face seem more masculine and chiseled.
The alternative would be an image with less contrast. Ambient light (natural light outdoors not augmented by electronic flash) in the afternoon can make a model look softer and more approachable.
As with depth of field, creating images with greater or lesser contrast, or photos that are high or low key will allow you to make a statement about the subject matter. That is, you can lead the viewer to perceive the subject in a certain way and/or have certain feelings and make certain judgments about the subject, all by changing its presentation based on the effects of light.
Electronic Flash and Studio Lighting
A book could be written about this subject. This is just to get you started. Also, you can employ studio lighting techniques away from the studio, using an electronic flash attached to the camera. This will increase the number of ways in which to present your subject (perhaps highlighted and therefore more dramatic or with more subdued light and therefore more approachable).
When I started at the non-profit government education foundation at which I eventually became the art director/production manager, part of my day was spent on Capitol Hill taking photos of students in seminars with senators and congressmen. I had a bounce flash, which I attached to a bracket on the camera. I could tilt it up and bounce the light off the ceiling, which would soften the light that fell upon the people I was photographing. Or I could point the flash directly at the students and legislators. I could also vary the intensity of the light the flash produced, and I could adjust both the camera shutter speed and aperture (see above description of depth of field).
Overall, I could make the lighting more dramatic or more subdued, depending on the tone in which I wanted to cast the subject matter. I even attached a white index card to the bounce flash with a rubber band so I could bounce the flash (the card would deflect the light) if the ceiling were too high.
If I were to replicate these lighting options in a photo studio with large, floor-standing studio lights, I might make the following decisions:
- I might use one flash on the camera and then a fill flash or fill light in the room, separate from the camera. The light on the camera might illuminate the front of the model’s face, while a light on the side of the model might cast other shadows and highlight additional portions of the model’s face (like the cheekbones). It might also make the overall face look more dimensional and less flat than what one light would create.
- I might avoid positioning lights below the model, since this could make the model look ghoulish and scary.
- I might avoid shooting the flash near a window or mirror, so as to avoid a reflected glare.
- I might choose to photograph the model with light coming only from one side (at a 90 degree angle) to subtly accentuate the shadows of the face.
- I might illuminate the model only from behind to create a silhouette effect.
- I might use a “softbox,” a lamp covered with a diffusion screen, to scatter the light and soften the look of the model.
Studio lights would make this easier, since I could see the lighting effect before tripping the flash (less easy to see, since it’s there only for an instant). To the best of my knowledge, studio lights today can be turned on, illuminating the subject, and can then be flashed for an instant for the photograph, to increase their intensity for a good exposure.
The goal of all of this is to brighten the subject and increase the detail created by precisely positioned illumination, without creating harsh shadows. Depending on the equipment, you can either do this in a photographic studio or out in the field (with a flash), without needing to artificially doctor up the image in Photoshop. And in all cases, the goal is to use light creatively and precisely to add a mood or tone or in some other way make a statement about the subject of the photo. And this artistic statement can reinforce the tone or message of the print book, large format print banner, or anything else you’re designing.
This entry was posted
on Saturday, February 4th, 2023 at 10:39 pm and is filed under Photos.
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