Cine lens

A cine lens, also known as a cinema lens, is a specialized lens designed and optimized for motion picture filmmaking. These lenses differ from still photography lenses in several key aspects, focusing on features that improve usability and performance in the demanding environment of film and video production.

Key Characteristics and Differences from Still Photography Lenses:

• Manual Control: Cine lenses prioritize manual control over aperture, focus, and zoom. They often feature large, geared rings that allow for precise and repeatable adjustments using follow focus systems, lens motors, and other filmmaking accessories.

• T-Stop vs. F-Stop: Cine lenses are typically rated by their T-stop rather than their F-stop. The T-stop is a more accurate measurement of the actual light transmission through the lens, accounting for light loss due to internal elements and coatings. This provides more consistent exposure across different lenses.

• Parfocal Design: Many cine zoom lenses are parfocal, meaning that the focus remains constant throughout the zoom range. This is crucial for maintaining sharp focus while zooming during a shot.

• Minimized Focus Breathing: Cine lenses are designed to minimize focus breathing, which is the change in angle of view as the focus is adjusted. Reduced focus breathing provides a more stable and visually appealing image when racking focus.

• Robust Build Quality: Cine lenses are built to withstand the rigors of professional filmmaking. They are typically constructed from durable materials and are weather-sealed to protect against dust and moisture.

• Standardized Lens Mounts: Cine lenses often utilize standardized lens mounts, such as PL mount (positive lock), which are widely used in the professional film industry.

• Color Matching: Cine lens sets are often meticulously color-matched to ensure consistent color rendition across different focal lengths. This simplifies post-production color grading.

• Markings and Scales: Cine lenses often feature clearly marked and highly accurate focus scales and aperture scales, facilitating precise adjustments and repeatability. These scales are typically larger and easier to read than those found on still photography lenses.

• Price: Due to their specialized design, high build quality, and advanced features, cine lenses are generally significantly more expensive than comparable still photography lenses.

Use Cases:

Cine lenses are primarily used in professional film, television, and commercial production. Their manual control, precise performance, and durable construction make them well-suited for the demanding needs of these applications. Although adaptable to some extent for still photography, the price and specialized features make them impractical for most still photography needs.