IRIX 45mm T1.5 Cine (ft) Overview

Designed for cine-style image capture and compatible with full-frame sensors, the Canon EF-mount 45mm T1.5 Cine Lens from IRIX features an array of sophisticated internal and external elements. External highlights include a 95mm front diameter, 0.8 MOD geared rings, luminous focus markings on the feet, and a detachable 1/4″-20 support foot. Internally, a nine-blade aperture delivers smooth, rounded bokeh, while five seals protect against harsh weather conditions and dust.

The IRIX 45mm T1.5 Cine Lens has 11 optical elements organized into nine groups. It has four HR (high refractive index) elements and three ED (extra-low dispersion) elements that work together to lower distortion and aberrations. It offers 180° of focus rotation and 75° of iris rotation, plus an 86mm front filter thread for added versatility.

45mm focal length

The 45mm focal length with a Canon EF mount captures crisp details and vibrant colors, making it a versatile choice for various scenes.

Full-Frame Coverage

With a 43.3mm image circle, this lens covers full-frame format sensors.

Rounded Bokeh

The nine-blade iris creates the characteristic “IRIX look” with a shallow depth of field, delivering smooth, rounded bokeh.

Fast T1.5 Aperture

A quick T1.5 maximum aperture allows for excellent performance in low-light conditions without needing to increase ISO sensitivity.

Matching with Other Primes

This lens matches the maximum aperture, color, and contrast of the 21mm and 45mm prime lenses, ensuring consistency across your shots.

Weather Sealing

Designed with seals against rain, snow, and dust, the IRIX 45mm T1.5 is ready for a variety of environments, enduring a wide range of temperatures.

0.8 MOD Gears

The 0.8 MOD geared focus and aperture rings provide cine-style control, ideal for use with follow-focus systems.

95mm Front Diameter

The industry-standard 95mm front diameter makes this lens compatible with most matte boxes, enhancing workflow on set.

Focus marks in feet

Engraved, luminous focus markings on the feet are durable and simple to read, even in low-light settings.

Smooth Focussing

The focus ring operates smoothly, with the ability to transition seamlessly between manual and motorized control.

FAQs for the IRIX 45mm T1.5 Cine Lens

1. What type of cameras is the IRIX 45mm T1.5 Cine Lens compatible with?

Canon EF-mount cameras can use the IRIX 45mm T1.5 Cine Lens, which offers cinema-style image quality and performance.

2. Does this lens support full-frame sensors?

Yes, the lens offers a 43.3mm image circle, which provides coverage for full-frame format sensors.

3. What benefits does the T1.5 aperture provide?

The quick T1.5 aperture enables the capture of high-quality images in low-light conditions, reducing the need to increase ISO settings. It also allows for a shallow depth of field, resulting in a cinematic look with a smooth, creamybokeh effect.

4. What makes thebokeh produced by this lens unique?

The IRIX 45mm T1.5 Cine Lens features a nine-blade iris that produces rounded, smooth bokeh, contributing to the signature “IRIX look” with a shallow depth of field.

5. Is the lens weather-sealed?

Yes, we have sealed this lens against environmental elements like rain, snow, and dust. Built to withstand a wide range of temperatures, this lens is reliable for outdoor and extreme-condition shooting.

6. What are the external design features of the IRIX 45mm T1.5?

The lens has a 95mm front diameter that is compatible with most matte boxes, as well as cine-style 0.8 MOD geared focus and aperture rings for use with follow-focus systems. It also has luminous focus marks engraved on the feet for simple readability.

7. What is the rotation range of the focus and iris rings?

The focus ring offers 180° of rotation for precise control, while the iris ring has 75° of rotation, enabling smooth and accurate exposure adjustments.

8. Can I use filters with this lens?

Yes, the IRIX 45mm T1.5 Cine Lens has an 86mm front filter thread, allowing you to attach filters to achieve specific visual effects.

9. How does the focus ring operate?

Both manual and motorized control options are available for the focus ring, allowing for smooth adjustments that are perfect for precise focus pulls.

10. What optical elements do we include to minimize image distortions?

The lens features 11 optical elements arranged in nine groups, including four high refractive index (HR) elements and three extra-low dispersion (ED) elements. This helps minimize chromatic aberrations and distortion, ensuring sharp, high-quality images.

11. Does this lens complement other IRIX cine lenses?

Yes, when multiple IRIX lenses are used in the same project, the IRIX 45mm T1.5’s design matches the maximum aperture, color, and contrast of the IRIX 21mm and 45mm primes.

12. Is a support foot included?

Yes, the lens comes with a detachable 1/4″-20 support foot to help provide additional stability, especially when mounted on rigs or follow-focus systems.