The Art Of Motion - Blur

One of the most enjoyable aspects of photography is the ability to create striking images in-camera, without relying heavily on post-processing. While editing certainly has its place, many creative effects can be achieved simply by understanding how your camera works.

Last Sunday, I visited the picturesque village of Odstock, where recent rainfall had transformed a normally gentle stream into a fast-flowing torrent. A small dip in the river creates an ideal spot for capturing the movement of the water, making it the perfect location to experiment with motion blur.

In this blog, I’ll explain how to create motion blur using either a camera or an iPhone. Although I’m most familiar with the iPhone, many other smartphones also offer long-exposure or slow-shutter features that can produce similar results.

Motion blur is created by slowing the shutter speed, allowing movement to be recorded over a longer period of time. Rather than freezing the action, the moving subject becomes beautifully blurred, creating a sense of motion and atmosphere. Fast-flowing rivers can be transformed into smooth, silky water, while moving subjects such as vehicles, clouds, or people can produce dramatic and creative effects.

There are countless ways to use this technique. Long exposures can capture flowing waterfalls, create sweeping cloud movement, produce colourful light trails from traffic (which I’ll cover in a future blog), or add a powerful sense of speed through panning techniques.

For now, though, we’ll focus on two popular subjects for motion blur photography: flowing water and moving vehicles, and how you can capture both with impressive results........

Misty Water Nikon D500, f/22, ISO 50, 2 sec, 16mm

The image above was captured using a Nikon D500 mounted securely on a tripod, fitted with a Nikon 16–85mm lens. To help achieve the final result, I also used a variable polarising filter, which reduced the amount of light entering the lens. This allowed me to use a much slower shutter speed without overexposing the image.

When photographing flowing water, the first step is to set your camera up on a sturdy tripod and carefully compose your shot. Take your time to ensure everything you want is included within the frame before making any adjustments to your camera settings.

I had planned to visit this location on the Sunday, but I was pleasantly surprised to discover that it had snowed overnight. I had been hoping for a frosty morning, but the fresh snowfall created an even more atmospheric winter scene, adding extra depth and character to the photograph.

Using Live View made it much easier to fine-tune the composition. Once I was happy with the framing, I adjusted the variable polarising filter to further reduce the available light. This enabled me to use a slower shutter speed, creating the smooth, silky appearance of the flowing water.

With the composition complete, I switched to Manual mode so I had full control over the exposure. I selected the lowest ISO available to minimise image noise, chose a mid-range aperture as my starting point, and set the shutter speed to two seconds. From there, it became a process of experimentation. Long-exposure photography often involves trial and error, so don’t be afraid to adjust your settings until you achieve the effect you’re looking for.

During the session, I captured around 30 images, all recorded in RAW format to retain the maximum amount of image data for editing later. As you’ll notice from the camera settings beneath the image, I eventually settled on an aperture of f/22. Normally I avoid using such a small aperture because diffraction can soften image quality. However, on this occasion there was simply too much available light, and stopping down to f/22 was the only practical way to maintain the two-second exposure without overexposing the photograph.

The final image was processed in Photoshop Express, where only subtle adjustments were made to enhance the finished photograph.

A dedicated Neutral Density (ND) filter is another excellent accessory for long-exposure photography. Unlike a polarising filter, an ND filter is specifically designed to reduce the amount of light reaching the camera’s sensor, allowing you to use much longer shutter speeds even in bright daylight. If you enjoy photographing rivers, waterfalls, coastal scenes, or moving clouds, an ND filter is well worth adding to your camera bag.

The photograph below was taken at Baker Street Underground Station using an iPhone XS Max and the third-party app ProCam. I selected the app’s Slow Shutter mode, which provides manual control over the exposure and enables true long-exposure photography—something that isn’t possible using the standard Photo mode on the iPhone.

Although it may sound a little complicated at first, the controls are straightforward once you’ve explored the app. The key to success is keeping the phone perfectly still throughout the exposure. I used the built-in timer to eliminate any movement caused by pressing the shutter button. Alternatively, you can use the volume button on a pair of wired earphones or a compatible Bluetooth remote shutter release.

Whatever method you choose, avoid touching the camera or phone during the exposure, as even the slightest movement can introduce unwanted blur. With a stable setup and a little patience, you’ll be surprised at the creative long-exposure images you can produce—even with a smartphone.

iPhone XS Max, ProCam app, f/1.8, ISO 4, 2 sec, 4.25mm

For the third image, I took a completely different approach. Rather than using a dedicated long-exposure app or a DSLR, this photograph was captured using the standard Camera app on an iPhone 11 Pro Max.

The image was taken with Live Photo enabled. Live Photos record a short sequence of movement before and after the shutter button is pressed, allowing you to play back a brief moment in time. One of the advantages of this feature is that Apple includes several creative effects that can be applied afterwards, one of which is Long Exposure.

By simply selecting the Long Exposure effect, the iPhone intelligently blends the recorded frames together to simulate a long-exposure photograph. This creates smooth movement in flowing water and other moving subjects, producing a result that closely resembles an image taken with a slow shutter speed on a traditional camera.

One point to be aware of is that the iPhone automatically crops the image slightly when applying the Long Exposure effect. For this reason, it’s worth composing your photograph a little wider than you normally would, ensuring that important parts of the scene aren’t lost during the automatic crop.

Unlike the previous examples, a tripod wasn’t necessary for this photograph. Thanks to Apple’s impressive image stabilisation and computational photography, the effect can often be achieved successfully when hand-held, although the best results will always come from holding the phone as steady as possible while taking the picture.

As these three examples demonstrate, long-exposure photography doesn’t always require expensive equipment. Whether you’re using a DSLR with filters, a smartphone app that offers manual control, or simply the built-in features of an iPhone, there are several ways to experiment with motion blur and create striking, creative images. The most important thing is to get out, try different techniques, and enjoy the process of learning what works best for you.

iPhone 11 Pro Max, f/2.4, ISO 25, 1/122 sec, 1.54mm

To conclude, motion blur is a technique that can be achieved with almost any camera, from a professional DSLR or mirrorless camera to a modern smartphone. Throughout this blog, I’ve demonstrated three different methods using two types of cameras, showing that you don’t need expensive equipment to produce creative long-exposure images.

If you’re looking for an even softer, silkier effect on flowing water or greater movement in passing trains and traffic, simply use a slower shutter speed. However, remember that every adjustment you make affects the overall exposure. As the shutter remains open for longer, you’ll need to compensate by reducing the amount of light entering the camera—whether that’s by lowering the ISO, selecting a smaller aperture, or using filters such as a polarising or neutral density (ND) filter.

Getting the perfect exposure is often a matter of patience and experimentation, so don’t be discouraged if your first few attempts aren’t exactly what you envisioned. Review your images, make small adjustments, and try again. The beauty of digital photography is that you can instantly see the results and learn from every shot.

Most importantly, enjoy the process. Motion blur is a fantastic technique for adding atmosphere, movement, and creativity to your photography. Whether you’re photographing rivers, waterfalls, coastlines, traffic, or trains, mastering long exposures will open up a whole new way of seeing and capturing the world around you.