Take a quick look at the image in playback mode. If your goal is to keep the entire shot sharp, magnify the photo to check the nearest foreground object and the most distant background object, just to be sure everything looks good.

Generally speaking, if your background is distracting, it’s best to use a shallow depth of field. But if the background adds to the scene – for instance, it contains beautiful clouds and a stunning mountain range, or it contributes valuable context – then use a deep depth of field.

Sometimes, despite your best efforts, capturing the entire subject or scene in sharp focus isn’t possible. This is a common problem when photographing landscapes with prominent foreground elements positioned close to the lens, or when dealing with high-magnification shots of products or still-life subjects.

But if you zoom into 100mm while standing in the same spot, still using an aperture of f/4, the depth of field changes to about 29.5-37.5 feet (9-11.4 meters) for a total DoF of 8 feet (2.4 meters).

Alternatively, you can focus about a third of the way into the scene, which is a good rule of thumb and will generally offer solid results, assuming you’ve used a relatively narrow aperture (f/8 or beyond is good) and a wide-angle lens.

Most photographers don’t need to gauge depth of field exactly while out shooting, so doing quick estimates or using easy rules of thumb works fine, especially if you check your LCD afterward.

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After you’ve taken an image, especially when you’re just starting out, I highly recommend you check your camera’s LCD to ensure you’ve nailed the depth of field.

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A deep DoF provides context, highlights small details, makes scenes appear more lifelike, and – when combined with certain composition techniques – increases depth. Here are some situations when a deep depth of field is best:

The lowest power objective should be in place for ... unplug it, wrap the cord around the ocular lenses, and put ... Focus the specimen using the 10x objective and ...

Rotary positioning stages are specialized types of rotary stages designed for applications demanding the highest levels of precision and accuracy in positioning. These stages are perfect for tasks like precisely rotating a delicate sample under a microscope, even by tiny fractions of a degree. They often feature advanced bearing systems, such as air bearings, to minimize friction and vibration.

Regardless of your skill level or the type of camera you possess, comprehending depth of field is essential to expanding your photographic horizons. It applies to every aspect of photography, from macro close-ups to sweeping panoramas, and it holds the potential to set you free creatively so you can capture stunningly artistic images.

Now let’s take a look at a few shallow depth of field examples. Pay careful attention to the way the shallow DoF helps emphasize the main subject in each shot:

If both pairs of sunglasses are polarized, the overlapping lenses will appear to be darker when you look at them straight on. If the questionable pair isn't ...

Remember, DoF isn’t just some technical mumbo-jumbo reserved for the pros – it’s a fundamental concept that anyone with a camera can use. Whether you’re capturing intimate portraits, vibrant street scenes, or breathtaking landscapes, mastery of depth of field can help transform your shots from snapshots into artistic masterpieces.

As you can imagine, this is useful when you want to keep the entire scene sharp; you just dial in your preferred aperture, then set your point of focus at the hyperfocal distance.

In every picture, there is a point of focus – the spot where you actually focus your lens. But there is also an area both in front of and behind your point of focus that also appears sharp, and that area corresponds to the depth of field.

Rotary stages, including high precision rotary stages, can also be mounted to each other, allowing the customer’s part to be rotated in multiple axes. In one such example we designed a stack of three rotary tables that was used to move a miniature spherical laser fusion target in three rotational degrees of freedom during laser micromachining.

Rotary stages are available in two primary types: manual rotary stages, which use hand-operated knobs or micrometers for precise but non-automated adjustments, and motorized rotary stages, which are equipped with electric motors for automated, programmable, and highly accurate rotational motion.

You may be familiar with f-stop values, which look like this: f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16, etc. The smallest f-numbers correspond to the widest apertures and therefore the shallowest DoFs. And the larger f-numbers correspond to the narrowest apertures and therefore the deepest DoFs.

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So if your subject is 33 feet (10 meters) away and your aperture is set to f/4, a focal length of 50mm will give you a depth of field range from around 22-63 feet (6.7-19.2 meters) for a total DoF of 41 feet (12.5 meters).

If all that sounds a bit technical, feel free to skip over the details. The key concept to understand here is that longer lenses produce shallow depth of field effects, whereas shorter lenses produce deep depth of field effects (assuming that the aperture and the distance from the subject remain the same).

On the other hand, some images have very small zones of focus, which is known as shallow depth of field. A shallow DoF photo is generally immediately recognizable because the subject will look tack-sharp while the background is rendered as a smooth, creamy blur:

Specifically, when you focus at the hyperfocal distance, your depth of field will extend from half your point of focus all the way to infinity.

Our motorized rotary stages use a variety of bearing and actuator technologies. For very stiff angular positioning at low to medium speeds, we use precision lapped worms and worm gears driven by a stepper or servo motor. Worm gear drive is especially valuable if the payload is offset and the system experiences a static torque. For the highest speed and precision, we recommend direct drive rotary tables such as our DRT series.

Embracing manual focus may seem difficult at first, but it really is a skill worth acquiring. In shallow depth of field photography, manual focus allows you to set the sharpness window exactly where you want it, ensuring critical focus on specific elements within your frame. (Imagine delicately highlighting the intricate details of a flower petal with pinpoint accuracy.)

Aperture refers to a hole in your lens through which light enters the camera. The larger the hole, the shallower the depth of field.

Depth offield calculator

Rotary motion is perhaps the most common and important types of motion and also the most widely used in every part of our daily lives.

No, our standard motorized rotary stage has only 1 limit switch. The switch is typically wired to pin 2 on the limit encoder connector. The limit switch is intended to be used for homing. The homing routine will work with an initial positive or negative jog move of the motorized rotary stage until the limit switch triggers. If an encoder is also used, the home or zero position can then be set at the point where the limit switch is triggered.

Note that using a wide aperture will also increase the amount of light hitting your sensor, which will in turn let you boost the shutter speed. This is a major benefit if you’re shooting in low light or you need ultra-fast shutter speeds to freeze the action.

Of course, getting closer or farther from your subject isn’t always feasible, plus it’ll change the size of your subject within the frame, so its usefulness can be limited.

On the other hand, if you’re photographing a landscape with a beautiful foreground, a stunning midground, and a jaw-dropping background, failure to use a deep depth of field will prevent the viewer from appreciating the entire scene.

Shallow depth of field can result in breathtakingly artistic photographs. However, you shouldn’t just widen your aperture and shoot with abandon; instead, you need to consider your compositions carefully – otherwise, the viewer will get overwhelmed by the blur and will start to feel lost.

When it comes to capturing the perfect shot, depth of field plays a crucial role in determining the overall look and feel of your images. However, there are instances where you might find yourself torn between using a shallow or deep DoF, and that’s where the technique of DoF “bracketing” comes into play.

But you may find yourself in a situation where DoF matters a great deal – for instance, if you’re a landscape photographer dealing with a very deep scene, you’re a macro photographer shooting at extreme magnifications, or you’re a product photographer and you don’t have the opportunity to reshoot if you mess up.

Don’t worry if manual focus is uncharted territory for you. It’s easier than you might think, so even if you’re intimidated, take the time to test it out and see how you feel. Also, bear in mind that you won’t need to use it all the time – it’s just a good tool to have in your back pocket for those times you’re struggling to get the desired results through autofocusing.

DOF simulator

While knowing the theory is great, it’s important to also understand how to apply depth of field when out shooting. Here’s my quick step-by-step approach to achieving the precise DoF effect you’re after:

Precision in rotation refers to the ability of a rotary stage to achieve and maintain a desired angular position with minimal error. It's about how accurately and reliably the stage can move to a specific angle and stay there. This is quantified by several parameters, including:

The idea is to test out different aperture settings and evaluate the results afterward. Start by framing up your composition, then vary the aperture settings to capture shots with different DoF effects.

And in deep DoF photography, you can use manual focus to ensure your lens is focusing at the hyperfocal distance, which will in turn ensure that both the foreground and background elements are sufficiently sharp.

Begin by carefully selecting a handful of photographers whose work resonates with you. Immerse yourself in their portfolios, taking the time to truly absorb each shot. Pay especially close attention to their deliberate DoF choices. Observe where the zone of sharpness starts and ends. Ask yourself: How does the photographer’s use of depth of field improve the photo? What effect does it have? How would changing the DoF change the shot?

This effect is especially popular in portraiture; photographers use it to draw attention to their subject while preventing background distractions. But you’ll also see shallow DoF macro photography, street photography, photojournalism, and more.

You can use a depth of field chart, calculator, or app to determine your exact depth of field given a particular focal length.

The RTR™ series precision rotation stages are available in 4-, 6-, 8-, 10-, and 12-inch diameter that include a preloaded, anti-backlash drive assembly to provide exceptional angular accuracy and repeatability.

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If your goal is a shallow depth of field effect, use a longer lens (if possible) and set it to its widest possible aperture. Then get as close as you can to your subject – without ruining your composition – and take your shot.

High-resolution encoders provide incredibly detailed feedback on the motorized stage's angular position. Sophisticated control systems allow for precise programming and execution of complex movements. These stages are commonly used in life science and diagnostic instruments, metrology (the science of measurement), micromachining (creating tiny components), optics alignment, and other fields where precise rotational positioning is critical.

Keeping your images sharp is an essential skill, and knowing how to make parts of your images sharp and parts out of focus is a key artistic tool for creating stunning results.

High-precision rotary stages are essential in applications where even minor angular deviations can significantly impact the quality or performance of the task at hand. For example, in fluorescence microscopy, a tiny error in rotation could lead to inaccurate localization of fluorescent molecules, compromising the analysis of cellular structures and processes.

In this section, I share a few techniques to help you really take advantage of image DoF. Some of the advice is more advanced, but if you’re looking to give your photos a boost, it can make a big difference.

When a stage is referred to as having uniform rotary motion, this means that the moving table’s velocity and direction of motion is constant. Rotation stages can have variations in their rotary motion, however. For example, inertia can influence rotary motion in certain ways. Objects that have lots of inertia will require much more energy to change their velocity or position and require more motor torque.

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is a photographer from Marietta, Ohio. He became interested in photography as a teenager in the 1970s, and has been a passionate student of the art ever since. Bruce recently won Photographer’s Choice award at the 2014 Shoot the Hills Photography Competition in the Hocking Hills near Logan, Ohio. He has also instructed local classes in basic digital photography. Check out Bruce’s photos at Flickr

Images that have a very large zone of acceptable sharpness are said to have a deep depth of field. Deep DoF photos tend to be sharp from front to back; it’s a popular look in landscape photography, where you often want to show every little detail from the scene.

If your goal is to achieve a deep depth of field effect, use a wide-angle lens (if possible) and get as far back from your subject as you can without sacrificing the composition. Then dial in a narrow aperture – often f/8 or beyond is ideal, though see the next section on hyperfocal distance if you’re not sure what’s best – focus about a third of the way into the scene, and take your shot.

The DRT-100 and DRT-200 series direct drive rotation stages are ultra-compact, direct-drive rotation stages that establish a new level of price, performance, and size. wdt_ID Travel 360 degrees 1 Accuracy +/- 150 urad 2 Repeatability +/- 5 urad 3 Payload 100 kg

So grab your camera and enjoy some photography. Experiment with different aperture settings, play with focal points, and see what you can create. Embrace the power of DoF to draw attention, evoke emotions, and tell compelling stories.

Yes. You must use a concept called the hyperfocal distance; when you focus at this point, you’ll maximize depth of field and generally keep all of your image sharp.

Now that you know the depth of field effect you’re after, it’s time to make the relevant changes to your composition and/or camera settings.

In other words, these three factors can combine to produce a very extreme depth of field effect, or they can cancel each other out.

The zone of sharpness is a key artistic component of each photo. Whether your image has a shallow DoF or a deep DoF can make a huge difference to how the shot is perceived and can often make or break the composition.

The size of this zone of sharpness will vary from photo to photo depending on different factors, such as your lens’s aperture setting and distance to the subject. So by adjusting your camera settings and your composition, you can determine the amount of your image that turns out sharp and the amount that ends up blurry.

So if you get up close and personal when photographing a flower, the depth of field will shrink. And if you take ten steps backward while still focusing your lens on that flower, the depth of field will increase.

For instance, if you’re photographing a portrait subject with a distracting background, failure to produce a shallow depth of field will often result in a very snapshot-esque, mediocre photo. The subject won’t stand out, and the image’s impact will be lost.

Most cameras only offer two modes where you can easily control the aperture and therefore the depth of field: Aperture Priority mode and Manual mode.

But how do you determine the hyperfocal distance when out in the field? You have a few options. First, you can use a hyperfocal distance calculator like the one offered by PhotoPills, which will let you dial in your focal length and your selected aperture, then spit out the hyperfocal distance.

Numerical aperture

What questions do you have about depth of field? What DoF do you most often use in your photos? After reading this article, do you plan to change your approach? Share your thoughts in the comments below!

This next photo is an example of a deep DoF shot. Notice how the areas close to the lens and the areas off in the distance look reasonably sharp.

While our rotary stages can be used as complete single-axis positioners, in many cases they are integrated with additional linear or rotary axes. A common example is to add a rotation stage to the top of an XY stage. In this case, it is important to consider the total range of travel. For applications where the payload must be aligned after loading it onto the stage stack, a limited travel of +/- 5 degrees may be sufficient. In other applications, 360-degree or unlimited rotation may be required.

Professional photographers are DoF masters, and you can learn a lot from their approach. Therefore, to elevate your own skills, I encourage you to spend time simply looking at the work of others.

Here are a few solid examples of photos featuring a deep DoF. As you can see, the scenes are consistently sharp from the nearest foreground element to the most distant background element. Note the way that the crisp details help draw you into the frame:

As you analyze these images, try to discern the subtle nuances of depth of field. Notice how a shallow DoF can isolate a subject from its surroundings, drawing attention and creating a sense of intimacy. Observe how a deep DoF can reveal intricate details throughout the frame, allowing the viewer to explore every corner of the scene.

Our RTR™ precision rotary stages are equipped with stiff crossed roller bearings and a precision worm gear drive to ensure outstanding angular accuracy and repeatability. Our DRT™ series stages utilize the direct drive technology and offer ultra-compact design.

(Quick tip: When you look through your camera’s viewfinder, you’re generally seeing a preview of the image at your lens’s widest aperture. But many cameras offer a depth of field preview button; press this, and you can preview the actual depth of field in real-time before hitting the shutter button. Check your manual to see if it’s an option on your camera!)

incoming x-ray photon interacts with outer shell electron and changes direction. Volume of irradiated material.

A rotation stage, also known as a rotary stage, restricts motion to a single axis of rotation and precisely controls the circular position for that axis of rotation. Dover Motion offers a range of standard high precision rotary stages and rotary tables, though our core strength is collaborating with our clients to configure the right precision motion solution for their unique application.

If you’re a beginner, Aperture Priority mode is probably the better pick – it’ll let you input the aperture, while your camera determines the best shutter speed for a good exposure. If you’re more advanced, Manual mode will let you select the aperture and shutter speed independently for greater creative control.

Bokeh means “blur” in Japanese. A strong bokeh effect is produced in the out-of-focus areas of your image (i.e., in areas beyond the depth of field). For the best bokeh, you’ll need an ultra-shallow depth of field, though you can also maximize bokeh quality in other ways, such as by increasing the distance between the subject and the background.

(Note that I’m using the terms “subject” and “point of focus” interchangeably here – if you accidentally focus behind your subject, then the DoF will be completely different.)

Rotary motion, also referred to as theta, rotational motion or circular motion, occurs when an object rotates or spins about an axis. This type of motion is analyzed in much the same way as linear motion. The motion may be uniform or non-uniform, but it must be circular.

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Flux Focusing Lens A Focusing Lens made for the beamo, beambox and beambox pro.Beamo's 30-watt CO2 laser zaps high voltage across a glass tube filled with ...

What is Raman Spectroscopy? The Raman effect describes the inelastic scattering of light at matter, during which energy is exchanged. Chemical data can be ...

Depth of focus

When it comes to mastering the art of depth of field, manual focus skills can make a huge difference. You see, by focusing manually, you can gain precise control over your DoF window (whether shallow or deep).

An anchor serves as a focal point within the frame; it should be a clear, solid area that is sharp and in perfect focus. It could be a glistening droplet delicately perched on a flower petal, the piercing gaze of a subject’s eyes in a portrait, or even a meticulously captured logo in a product photograph. The specifics aren’t important – what matters is that it provides a sort of island for the viewer to lock on amid the background blur.

No. Depth of field is usually about one-third in front and two-thirds behind your point of focus, though as your focal length increases, the DoF distribution does become more equal.

The hyperfocal distance is a special point of focus in your scene. It’s the distance for a given aperture and focal length that allows you to maximize the depth of field.

That way, you can evaluate the shots afterward and decide which works best. It’s also a great learning experience that’ll help you understand how to better apply depth of field in the future!

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Ultimately, the DoF aid you choose depends on your preferences – so feel free to try each option out and see which one you like best!

A shallow depth of field will make your subject stand out from the background. Here are a few situations when a shallow DoF often makes sense:

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By the way, if you’re struggling to create photos with anchor points, it could be a sign that the lens’s aperture is a little too wide. Try subtly narrowing the aperture and see if the photos improve!

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And there you have it! Now that we’ve delved into the captivating world of depth of field, you’re ready to unleash your creative potential and take your photography to new heights.

Focus stacking is a technique that involves capturing a series of shots, each with a slightly different point of focus, and blending them together in post-processing. That way, you can extend the zone of sharpness throughout the image and overcome any DoF limitations. (Note that some editing software, such as Lightroom, doesn’t offer stacking capabilities, but other programs – such as Photoshop – provide the tools needed to quickly align and merge your stacked files.)

By the way, it’s important to recognize that there isn’t always a single “best” DoF for a particular scene. Some subjects look great no matter how you shoot them! So if you can’t decide which version you prefer, you don’t need to stress; perhaps all of your files look great.

For instance, if you shoot at f/2.8 and you get close to your subject and you use a telephoto lens, you’ll achieve an ultra-shallow depth of field. But if you get close to your subject while using a wide-angle lens, the two factors will generally cancel out, resulting in a medium depth of field.

So if you’re photographing a landscape and you want a deep depth of field, just set your aperture to f/11 or so, and you’ll generally get foreground-to-background sharpness. If you’re photographing a portrait and you want a shallow depth of field, set your aperture to f/2.8 and you’ll often get a beautiful blurred background.

When focusing stacking, it’s crucial to maintain compositional consistency across all shots. Some photographers do get solid results from handholding, but I highly recommend using a sturdy tripod, at least at first. Over time, you can start experimenting with alternative approaches.

Adjusting the aperture (f-stop) of your lens is the simplest way to control your depth of field while setting up your shot.

If you’re aiming for a shallow depth of field look, you generally don’t need to calculate the depth of field precisely. On the other hand, if you want to keep the entire shot sharp, you may want to calculate the hyperfocal distance (see the section on hyperfocal distance below) to determine the best point of focus.

Carefully observe your scene. Ask yourself: Do I want to blur out the background? Or do I want to keep the entire shot sharp?

A rotary stage is a device that provides precise rotational movement for a workpiece or sample. It typically consists of a platform that rotates, a drive mechanism, and a bearing system. The platform is where you mount the object you need to rotate. The drive mechanism provides the force to turn the platform. Motorized drives offer greater precision and the ability to program specific movements. The bearing system ensures smooth, accurate motion with minimal friction or wobble. This is critical for achieving the precise positioning required in many applications. Some rotary stages also incorporate feedback devices, such as encoders, to provide precise position information, allowing for closed-loop control and highly accurate positioning.