What are the advantages of the RAW photo format

The term RAW is a direct translation to English, meaning "raw". When it comes to photography, this particular format is highly regarded for its sheer perfection. It is worth noting that not all cameras have the capability to capture images in RAW format, as it is limited to more advanced and sophisticated devices. To grasp the concept of RAW in relation to photography, an understanding of its acquisition process and its notable advantages over the widely known JPEG format is required.

What RAW is and its differences from JPEG

As mentioned earlier, RAW is a type of photo format that is commonly found in professional and semi-professional cameras. To put it in terms of traditional film cameras, RAW is comparable to a negative, containing more information about the photo rather than the photo itself. The main advantage of RAW format is the extensive range of data processing options it offers through specialized software on a computer. To understand how a photo in RAW format is obtained, it is important to consider the entire process of image formation:

1. The camera’s image sensor captures an analog signal;
2. A dedicated converter translates the analog signal into a digital one;
3. Color interpolation is performed to reconstruct the full spectrum of colors;
4. The camera’s processor processes the data according to the device’s settings;
5. The photo is then saved with compressed data in either JPEG or TIFF format.

When shooting in RAW format, items 2-5 are not captured, which means that the camera directly records the analog "raw" signal. As a result, the user receives a larger photo, but with basic data. The processing takes place on the computer using specific software, without any adjustments applied to the photo.

When saving a photo in JPEG, some data is lost, and the extent of compression affects the amount of artifacts present in the photo. The higher the compression, the more artifacts might be visible, leaving the photographer with fewer options for further image processing on the computer.

One distinguishing factor between JPEG and RAW is that JPEG is the ultimate format, whereas RAW encompasses a range of formats that can differ from one camera to another. Even among cameras of the same brand, there can be variations in the final format. An unprocessed RAW image is not accessible on any device except for the camera itself and specific software on a PC.

Pros and cons of RAW format

Photographers who are professionals opt for this choice when it comes to saving their photos, as it allows them to later edit and process them as necessary. The JPEG format does not offer this flexibility. However, the advantages of using the RAW format don’t stop there.

1. The digitization of RAW files ranges from 12 to 14 bits, whereas JPEG files are limited to 8 bits. This means that users have a greater ability to manipulate the color scheme without the risk of introducing artifacts to the image. This is particularly noticeable when attempting to brighten darker areas in a photo. Many experienced photographers refer to this as the bit depth or color depth.
2. When dealing with high-contrast lighting conditions, shooting in RAW is more convenient, as its dynamic range is several steps higher than that of JPEG.
3. It’s possible to adjust white balance after taking a photo, meaning that users can select the best option on their computer rather than taking multiple photos with different white balance settings.
4. When editing a photo on a PC, it’s possible to modify parameters such as brightness, color saturation, noise, and sharpness.
5. Formatting a photo on a PC doesn’t alter the original source, allowing users to create multiple final images with different settings from a single RAW photo.
6. Various format converters utilize different mechanisms for processing photos, resulting in different final outcomes. Users can choose a program that suits their preferences and helps them achieve their desired result.
7. A RAW image doesn’t have a fixed color space, giving users the ability to choose a more suitable option such as sRGB or Adobe RGB in the future.

However, there are certain drawbacks to consider when shooting in RAW.

1. Slow processing: When shooting in this format, the device takes a long time to process the image, which can be overwhelming for novice users.
2. Large volume: RAW photos occupy a significant amount of space on the memory card, so it is necessary to have a medium with high storage capacity and data transfer speed.
3. Complexity of processing: Working with RAW files on a computer requires special converters, which may be surprising for beginner photographers.

The advantages of the RAW format, particularly in terms of color space and color depth, need clarification. Let’s explore what these terms mean.

The concept of color space

In the field of photography, there exists a concept known as color space. This refers to an abstract mathematical representation of a color palette consisting of three colors in a three-dimensional form. By utilizing primary colors such as red, yellow, and blue, it becomes possible to produce different colors. In this case, each color and shade possesses specific parameters that are determined by values within a three-dimensional coordinate system.

CIE xyz is considered the most comprehensive color space as it encompasses the entire range of colors perceivable by the human eye and serves as a reference point. However, it is important to note that no device currently exists that can accurately depict the entirety of this color spectrum. As a result, various other color spaces have been developed specifically for technological applications.

At present, the two most commonly used color spaces are sRGB and Adobe RGB. The initial choice was a collaborative effort between Microsoft and HP back in 1996. This standardized model exclusively covers approximately 35% of the colors defined by the CIE.

Adobe RGB was introduced two years later after sRGB. It was created by Adobe Systems. The main advantage of Adobe RGB is its ability to display 50% of the CIE color space. However, in most cases, the differences between colors are hardly noticeable and can only be discerned with specialized equipment and software. This color space is primarily used in professional photography.

Modern cameras offer support for both Adobe RGB and sRGB, but many users often find it difficult to decide which color space to choose. For beginners and those who save their images in JPEG format, sRGB is usually the default choice. Although it is possible to change this option, the practical difference will be imperceptible. Experienced photographers point out that inexperienced photographers often opt for Adobe RGB assuming that it provides a greater range of colors, but in reality, they do not see any noticeable difference.

When it comes to saving data in RAW format, the question becomes essentially irrelevant because color space does not apply to this format and is already assigned during the computer processing stage.

Color depth

For novices in the world of photography, one important inquiry often arises: what exactly is color depth in digital cameras? When we take a picture, we are essentially capturing an image composed of numerous pixels, or itty-bitty dots. Each of these dots represents a specific area on a grid. The bits used to encode these dots, or more specifically, the colors of the pixels, play a significant role in determining the overall quality of the image. In the case of JPEG format, 8 bits of information are assigned to each dot. On the other hand, RAW format offers a higher color depth with either 12 or 14 bits. Essentially, this means that RAW format is capable of providing more accurately rendered colors. This is particularly important in photography, as more precise color reproduction allows for greater creative freedom and experimentation.

How to enable RAW in your camera

As stated earlier, each brand has its own variation of the RAW format. Nikon refers to it as NEFF, while Canon uses CR2. The key distinction lies in how the processor handles the data, resulting in the need for different converters for each format. This is due to manufacturers using different processors in their equipment. Each processor operates on its own system, making it impossible to achieve uniformity.

Interestingly enough, there was an attempt in the past to create a universal version called DNG, which was developed by Adobe. However, it did not gain widespread adoption and was only utilized in a few cameras from various brands.

In order to enable the RAW format, users simply need to access their camera settings and select photo processing options. Within these options, they can choose the desired photo size and recording format. To capture photos with "raw" data, it is necessary to select the RAW option. It is worth noting that while the final photo may have a different name, the term "RAW" is commonly used in the settings of cameras across most brands.

How to take photos in RAW

There are some aspects in which capturing images in RAW format is simpler compared to capturing in JPEG format. This is because when shooting in JPEG, all the settings have to be fixed beforehand since they cannot be modified on the image afterward. On the other hand, in RAW format, it is unnecessary to make final decisions on aspects such as white balance, noise, and color space, as they can be adjusted during post-processing. To effectively work with RAW files, it is crucial to have a clear understanding of how the image will be processed in the future and the intended purpose. It is not advisable to capture images haphazardly, but rather to have a specific goal in mind during the editing process.

Processed RAW photo

Valuable advice for utilizing RAW: it is unnecessary to economize on bit rate. While working with the format, users have the option to select either 12 or 14-bit encoding. Initially, it may appear that 2 bits is insignificant, but in reality, this equates to 12288 distinct color gradients, which has great significance in the field of photography. There is no need to fear extended processing duration or that the photo will consume a substantial amount of storage.

How to open RAW

You cannot open RAW files with a basic photo editing software. To accomplish this, you must utilize specialized converters, the most straightforward of which come pre-installed on the camera’s disk. Nikon provides the Nikon Imaging and Capture NX converter, while Canon offers the Canon Utilities RAW Image Converter.

Alternatively, you can utilize the regular version of Photoshop, but you will need to install the Adobe Camera RAW extension separately. The main drawbacks of these programs are their expensive licensing fees.

Additionally, there are several software options available for viewing and processing files such as XnView, IrfanView, and ACDSee. Both XnView and IrfanView are free to download, but their basic versions have limited features. To enhance their capabilities, you can install various plugins. On the other hand, ACDSee is a paid program that offers a comprehensive range of features for file viewing, processing, and organization.

Conclusion

The RAW format provides the opportunity to make extensive edits to photos without worrying about adjusting settings during the actual shot. While it is a preferred format, it is only suitable for those who have an understanding of how they plan to process the photo in the future.

Tip: Beginner photographers should not opt for RAW format as it is crucial to grasp the impact of settings on the final photo while shooting and then use that knowledge to process "raw" data on a computer.