Infrared Photography: Exploring Wavelengths and Preferences

Photography is a versatile art form, and one of its lesser-known facets is infrared photography. This technique involves capturing images using wavelengths of light that are beyond the visible spectrum. During my photography journey, I've experimented with various infrared setups and discovered that my preference leans towards near infrared. This article aims to delve into the world of infrared photography, exploring different wavelengths and sharing insights on personal preferences.

The Basics of Infrared Photography

Infrared photography is a process that involves capturing images using light that is beyond the visible spectrum. Typically, this involves using specialized filters that block visible light while allowing infrared (IR) light to reach the camera's sensor. IR light has wavelengths ranging from around 700 nanometers (nm) to 1,400 nm, with visible light spanning from 380 nm to 700 nm.

Why Near Infrared is My Preference

After exploring the world of infrared photography, I found that near infrared (NIR) provides a unique and visually striking result. Near infrared refers to the range of wavelengths just beyond the visible red light, typically between 700 nm and 900 nm. This preference is influenced by the fact that near infrared wavelengths enable photographers to capture images with enhanced depth and unique colors, often creating a dreamlike or ethereal appearance.

My Favorite Infrared Filter: Ilford SFX 200 with 750 nm Filter

Back when I still had the time and resources to dedicate to photography, my favorite infrared setup was using Ilford SFX 200 film with a 750 nm filter. This combination allowed me to achieve stunning results that are both technically impressive and artistically engaging. The Ilford SFX 200 film is known for its high ISO of 200, which makes it particularly well-suited for capturing infrared images in low-light conditions. The 750 nm filter ensures that almost all visible light is blocked, while allowing a significant portion of near infrared light to reach the film.

Green Wavelength: 550 nm is Not Infrared

A common misconception in the world of infrared photography is the use of wavelengths around 550 nm. This wavelength, while within the visible spectrum, is far from infrared. In fact, 550 nm corresponds to green light, which is distinct from infrared. Green light is in the middle of the visible spectrum, and its inclusion in an infrared setup would typically result in unwanted glare and a failure to capture the unique qualities associated with true infrared photography. It's important to use filters specifically designed for infrared to achieve the desired results.

Choosing the Right Wavelength for Your Needs

When choosing the right wavelength for infrared photography, it's essential to consider both the desired artistic effect and the technical requirements of your project. Near infrared (700-900 nm) is generally preferred for its ability to produce striking visual effects and its compatibility with a wide range of imaging equipment. However, there are also instances where other wavelengths might be more suitable, depending on your objectives.

Conclusion

In conclusion, infrared photography opens up a world of possibilities for creative expression and technical exploration. By understanding the properties of different wavelengths and choosing the right filters, photographers can achieve unique and captivating results. My personal preference for near infrared, exemplified by my use of Ilford SFX 200 with a 750 nm filter, has proven to be a rewarding journey. Green wavelengths, like 550 nm, are not infrared and should be avoided to preserve the authenticity of your infrared photography.

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