Sigma 18-35mm CT.2 Cinema Lens EF Mount

Sigma 18-35mm CT.2 Cinema Lens

EF MOUNT

114mm Manual

Sigma 18-35 Art Lens Mod by Cinematics
Used in Studio for a couple of video Shoots

Sigma 18-35mm T2 Cinema Lens.

1. Optical Design and Aperture:

   • The Sigma 18-35mm T2 is part of the High Speed Zoom Line designed specifically for cinematographers. It features a constant aperture of T2 throughout the zoom range.
   • The lens construction consists of 17 elements in 12 groups, including SLD (Special Low Dispersion) glass elements to minimize chromatic aberrations and enhance image quality.
   • The iris has a nine-bladed design, resulting in smooth and rounded bokeh when shooting wide open.

2. Compatibility and Image Circle:

   • The lens covers a Super 35mm-sized sensor, which means it's suitable for cameras with an APS-C or similar sensor size.
   • Its image circle has a diameter of 28.4mm, making it ideal for Super 35mm cameras.

3. Focal Length and Angle of View:

   • The focal length range is 18mm to 35mm, providing versatility for various shooting scenarios.
   • Here are the approximate horizontal angles of view for different camera apertures:
     • Full-frame camera (36mm×24mm): 68.7° (wide) to 38.7° (telephoto)
     • Super 35 digital cinema camera (24.6mm×13.8mm): 66.7° (wide) to 37.4° (telephoto)
     • APS-C camera (23.7mm×15.7mm): Similar to the Super 35 angle of view¹.

4. Focus and Handling:

   • The lens has an internal focus design, meaning the physical length of the lens doesn't change during focusing.
   • It offers 180 degrees of focus barrel rotation, allowing precise manual focus adjustments.
   • The lens features focus scales marked in feet.

5. Physical Characteristics:

   • Front lens diameter: 95mm
   • Length (without lens support foot): 129.5mm
   • Weight: Approximately 1445g (for EF mount) or 1510g (for PL mount)
   • The lens also includes a removable lens support foot for added stability when using it on rigs or gimbals.

6. Resolution and High-Resolution Shooting:

   • The Sigma 18-35mm T2 is fully ready for high-resolution shooting, supporting resolutions up to 6K-8K.
   • Its outstanding optical performance ensures sharpness and clarity even at higher resolutions.

7. Value and Compactness:

   • Despite its impressive optical capabilities, this zoom lens remains compact and lightweight.
   • Sigma has managed to offer exceptional image quality while keeping the lens relatively affordable.

In summary, the Sigma 18-35mm T2 Cinema Lens is a versatile, high-speed zoom lens designed for filmmakers who demand both optical excellence and practicality. Whether you're shooting indie films, documentaries, or commercials, this lens delivers outstanding results without breaking the bank.