What Is 120 film

Overview

120 film is a type of medium format roll film that has played a pivotal role in the evolution of photography since its introduction. Unlike the more common 35mm film, which measures 35 millimeters in width, 120 film is significantly wider at 60 mm, allowing for larger negatives and superior image quality. This format was originally developed by the Eastman Kodak Company in 1901 for use in the Brownie No. 2 camera, a consumer-friendly device that helped popularize amateur photography.

The naming convention '120' comes from Kodak's internal numbering system for roll films, which included types 101 through 127 and beyond. While many of these formats have since become obsolete, 120 film has endured due to its versatility and image fidelity. It quickly became the standard for medium format cameras throughout the 20th century, especially in professional and studio photography where detail and dynamic range were paramount.

Despite the rise of digital photography in the 21st century, 120 film remains in active production and use. Brands like Kodak, Fujifilm, and Ilford Photo continue to manufacture it, catering to a niche but dedicated community of film photographers. Its longevity underscores its significance as a bridge between early 20th-century photographic innovation and modern analog revival movements.

How It Works

Understanding how 120 film functions requires examining both its physical construction and its interaction with camera systems. The film is mounted on a plastic spool and backed with a paper liner that protects it from light while allowing frame numbers to be visible through a red window on the camera back. This design was revolutionary at the time, enabling photographers to advance the film manually while tracking exposures.

• Roll Construction: 120 film consists of a 60 mm wide emulsion-coated strip wound around a plastic spool with a paper backing. The total length is approximately 800 mm, allowing for multiple exposures.
• Frame Sizes: Depending on the camera, 120 film can produce different frame sizes such as 6×4.5 cm, 6×6 cm, and 6×7 cm. Each size yields a different number of exposures per roll.
• Exposure Count: A 6×6 cm camera typically captures 12 exposures per roll, while 6×4.5 cm systems can yield up to 16.
• Backing Paper: The paper liner prevents light leaks and includes numbered windows that align with a red window on the camera body for frame counting.
• Manual Advancement: Unlike 35mm cameras with motorized advance, many medium format cameras using 120 film rely on manual winding, requiring precision from the user.
• Emulsion Types: Available in both color negative (e.g., Kodak Portra 400) and black-and-white (e.g., Ilford HP5 Plus) varieties, offering flexibility in artistic expression.

Key Details and Comparisons

This comparison highlights why 120 film occupies a unique niche. While 35mm film offers convenience and affordability, its smaller negative limits enlargement potential and dynamic range. In contrast, the 56×56 mm negative of a 6×6 cm 120 film frame captures significantly more detail—roughly four times the surface area of a 35mm frame. Large format film surpasses it in resolution, but at the cost of portability and ease of use. 120 film strikes a balance, making it ideal for portrait, landscape, and commercial photography where quality is essential but workflow efficiency matters.

Real-World Examples

Throughout the 20th century, 120 film was the medium of choice for many iconic photographers. Ansel Adams, though better known for large format, used medium format 120 film for field scouting and preliminary compositions. Diane Arbus famously used a 6×6 cm Rolleiflex twin-lens reflex camera loaded with 120 film to capture her haunting portraits, leveraging the square format and fine detail to powerful effect. The film’s ability to render subtle tonal gradations made it ideal for black-and-white photography, a staple in documentary and fine art work.

Modern photographers continue to embrace 120 film for its aesthetic qualities. In fashion photography, brands like Vogue have featured editorials shot on 120 film for its organic texture and color rendition. Independent filmmakers have also experimented with scanning 120 negatives for cinematic projects, drawn to the unique grain structure and dynamic range.

1. Rolleiflex 2.8F: A classic twin-lens reflex camera using 120 film, favored by street and portrait photographers.
2. Hasselblad 500CM: A modular medium format system camera popular in studio and portrait work.
3. Bronica ETR-S: A versatile SLR offering interchangeable backs and lenses.
4. Mamiya 7 II: A lightweight rangefinder with a 6×7 cm frame size, ideal for landscape photography.

Why It Matters

120 film is more than a relic of photographic history—it represents a commitment to image quality and craftsmanship that continues to influence both analog and digital photography. Its enduring use reflects a broader cultural appreciation for tangible, deliberate processes in an age of instant digital capture.

• Impact: Preserved the legacy of medium format photography, influencing digital sensor design in mirrorless and DSLR cameras.
• Cultural Significance: Enabled iconic 20th-century images, from war photography to fashion editorials.
• Educational Value: Teaches photographers precision, composition, and patience due to limited exposures.
• Artistic Flexibility: Supports multiple aspect ratios and film types, encouraging creative experimentation.
• Sustainability: Reusable cameras and reloadable film backs reduce electronic waste compared to digital systems.

As long as there are photographers who value the tactile experience and unmatched resolution of film, 120 film will remain relevant. Its blend of historical importance and contemporary application ensures it will continue to inspire new generations behind the lens.