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In this image a deep depth of field allows the viewer to take in many subjects, including an artillery shell mid-flight. Photo by Staff Sgt. Steven Schneider In this image a deep depth of field allows the viewer to take in many subjects, including an artillery shell mid-flight. Download Image  Share Image: X Facebook Email Photo by: Staff Sgt. Steven Schneider VIRIN: 170918-O-N0132-7230C

You can affect the depth of field by changing the following factors: aperture, the focal length and the distance from the subject.

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Distance to subject refers to the length between the camera and the focus of the image. The closer the camera is to the subject it is focusing on, the narrower the depth of field will be. Inversely, the farther away the subject is from the camera, the wider the depth of field will be.

Optical designers use a variety of tools to recognize, and try to correct for, aberrations. These tools often include computer generated spot diagrams and chromatic focal shift comparisons. Spot diagrams represent an estimation of the smallest spot size an optical lens can focus to. Chromatic focal shift displays the focal length of an optical lens over different wavelengths. A smaller spot size and lower degree of chromatic focal shift are the superior options. See the benefits of color-corrected optical lenses by comparing spot diagrams and chromatic focal shift graphs of TECHSPEC hybrid aspheric lenses, TECHSPEC aspheric lenses, and TECHSPEC achromatic lenses.

Infographic illustrates how changing the aperture, the focal length and the distance from the subject affect the depth of field. Download Image  Share Image: X Facebook Email Photo by: DINFOS PAVILION Team VIRIN: 200907-D-PA656-0002

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Depth of field (DoF) is the area between the nearest and farthest points from the camera that are acceptably sharp in an image. A deep DoF means all or most of your photo will be in focus, including the foreground, subject and background. Use a deep DoF in group photos, landscape shots and when elements in the background or foreground add to the message the photo is attempting to communicate. A shallow DoF means more narrow range will be acceptably sharp in the image. Shallow DoF is good to use when you want to isolate your subject from their surroundings, such as in a portrait or when elements in the background or foreground may be distracting.

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Knowledge Center/ Application Notes/ Optics Application Notes/ The Benefits of Color-Corrected Optical Lenses

In this image you can see how a shallow depth of field keeps the focus on the action. Photo by Samuel King In this image you can see how a shallow depth of field keeps the focus on the action. Download Image  Share Image: X Facebook Email Photo by: Samuel King VIRIN: 170908-F-OC707-0517C

The focal length of the lens determines the image magnification. The wider the lens, the shorter the focal length. This allows you to capture a wider depth of field. The longer or more zoomed in the camera lens, the less depth of field you capture.

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Chromatic aberration occurs in conventional optical lenses when different wavelengths of light focus at different points along the optical axis, and is typically eliminated by introducing multiple lenses, fabricated from glasses with different indices of refraction, into an optical assembly. However, by eliminating chromatic aberration with color-corrected aspheric lenses, an imaging system with fewer lenses can be designed. Reducing the element count not only minimizes the size and weight of the assembly, but it also simplifies the assembly process, yielding imaging lenses that ultimately cost less and outperform assemblies made of traditional spherical optical components. For more in-depth information on chromatic aberration, please read Chromatic and Monochromatic Optical Aberrations.

As shown, the use of high performance optical lenses, such as TECHSPEC hybrid aspheric lenses, TECHSPEC aspheric lenses, or TECHSPEC achromatic lenses, can greatly improve the performance of an optical system. Using high performance optical lenses minimizes both the spot size and chromatic focal shift.

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Minimizing the number of lenses in an optical assembly is a critical design consideration. Selecting single optical lenses that can simultaneously reduce multiple aberrations is an ideal way to achieve this goal. Color-corrected aspheric lenses, for instance, reduce both spherical and chromatic aberration, making them ideal for a range of applications where precision results and image quality are key.

In this image a medium depth of field allows the viewer to focus on multiple subjects without creating confusion for your eyes Photo by Sebastian J. Sciotti Jr. In this image a medium depth of field allows the viewer to focus on multiple subjects without creating confusion for your eyes Download Image  Share Image: X Facebook Email Photo by: Sebastian J. Sciotti Jr. VIRIN: 170525-D-SS007-019C

The aperture is the opening created by a set of overlapping metal blades, known as the diaphragm, inside a photographic lens. This opening controls the amount of light coming through the lens. The wider the aperture, the less depth of field you capture. The smaller the aperture, the deeper the depth of field.

The following graphic illustrates how changing these factors: aperture, focal length and the distance from the subject affect the depth of field.