SIRUI IronStar 60mm T1.9 1.5x Cine Lens - PL/EF mount, Blue Flare

When used on a full-frame camera, the 1.5x squeeze ratio results in a 2.39:1 widescreen aspect ratio. On a 16:9 sensor, it produces approximately a 2.66:1 image. On a 3:2 sensor, it yields approximately 2.25:1.

Yes, the lens can be used on Super35 or APS-C cameras. However, it will not provide full-frame coverage, and the effective focal length and squeeze ratio may differ slightly from full-frame usage.

The blue flare is an inherent optical characteristic of this specific lens version. It is most noticeable when a strong light source is positioned at an angle to the lens. You can control its intensity and placement by adjusting camera position and lighting.

Focus breathing refers to the change in focal length (and thus field of view) as you adjust focus. This lens is designed to minimize focus breathing for smoother focus transitions during video recording.

This specific model is designed with an interchangeable mount system. Typically, you would purchase the lens with one mount, and additional mounts may be available separately, or the lens is sold in configurations that include both.

The minimum focusing distance for the SIRUI IronStar 60mm T1.9 1.5x Cine Lens is 0.78 meters (approximately 2.56 feet).

While designed for cinema, it can be used for still photography. However, the anamorphic nature and specific flare characteristics are primarily intended for video production.

Ensure the correct mount (PL or EF) is securely attached and that the camera's electronic contacts are clean. If using EF mount, verify camera compatibility.

Re-adjust the back focus. Ensure the focus ring is set correctly and verify focus using live view or a monitor. Check if focus breathing is minimized by adjusting focus slowly.

Use a compatible matte box with flags to control ambient light. Ensure the lens hood is properly attached if applicable. Note that the blue flare is a characteristic of this lens and may be desired.

Do not force the gears. Ensure no debris is obstructing movement. If stiffness persists, consult a professional technician.