Sirui Jupiter 28-85mm T3.2 Full-frame Cine Zoom Lens - PL Mount
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Product Information
Full details
The Sirui Jupiter 28-85mm T3.2 Full-frame Cine Zoom lens is designed for filmmakers seeking a versatile, high-resolution zoom with consistent focus. Its primary benefit is the parfocal design that maintains focus throughout the zoom range, simplifying complex shots and ensuring story consistency. A key consideration is its PL mount, which requires specific camera compatibility. This lens offers 8K resolution, minimal focus breathing, and a stepless T3.2 to T22 aperture for precise exposure control. Its robust, all-metal construction and included protective hard case highlight its professional build.
All features
| Brand | Sirui |
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Extended Product Information
FAQs
What is focus breathing, and how does this lens handle it?
Focus breathing is the change in focal length (and thus field of view) when adjusting focus. The Sirui Jupiter 28-85mm T3.2 is designed to minimize this effect, ensuring a stable image even during focus pulls.
Can I use this lens on a mirrorless camera?
This lens has a native PL mount. However, E-mount and RF-mount adapters are available separately, allowing compatibility with many full-frame mirrorless cameras.
What is the minimum focusing distance?
The closest focusing distance for the Sirui Jupiter 28-85mm T3.2 lens is 0.7 meters (approximately 2.3 feet).
Does the lens come with a lens hood?
The product information does not specify a lens hood. However, it does include a custom hard case for protection.
How is the bokeh quality?
The lens features 11 aperture blades, which contribute to producing round and pleasing bokeh, adding a cinematic quality to the background blur.
What is the weight of the lens?
The lens weighs approximately 2.52 kg (5.56 lbs).
What kind of cameras is this lens designed for?
It is designed for professional cinema cameras that utilize a PL mount and cover full-frame or large-format sensors. It can also be adapted for use on mirrorless systems.
Troubleshooting
Lens not locking onto camera mount.
Ensure the PL mount on both the lens and camera are clean and free of obstruction. Align the mounting marks correctly and rotate firmly until it locks.
Focus is not parfocal (shifts during zoom).
Verify that the lens is fully seated on the camera mount. Check if any external focus gears or accessories are misaligned. Contact support if the issue persists, as it may indicate an internal lens calibration problem.
Aperture ring feels stiff or loose.
Gently check for any obstructions around the aperture ring. If the stiffness or looseness is significant, do not force it. Contact customer support for inspection and potential service.
Image appears soft or lacks detail at certain focal lengths.
Confirm the lens is set to its sharpest aperture range (typically T5.6-T11). Ensure the focus is accurately achieved. Clean the lens elements as dust can degrade image quality.
Pros and Cons
Pros
- Versatile 3x zoom range (28-85mm) covers common focal lengths.
- Parfocal design maintains focus while zooming, simplifying workflows.
- Excellent image sharpness and pleasing bokeh due to 11 aperture blades.
- Robust build quality with an all-metal body.
- Includes a protective, IP67-rated hard case for transport and storage.
Cons
- PL mount limits compatibility with certain camera systems (adapters may be needed).
- Heavy at 2.52 kg, requiring sturdy support.
- Minimum focusing distance of 0.7m can be limiting for very close-up shots.
- Manual focus only, requiring an experienced focus puller for complex shots.
Setup, Compatibility & Care
Setup: Ensure your camera body has a compatible PL lens mount. Mount the lens by aligning the red dot on the lens with the red dot on the camera mount, inserting the lens, and rotating it clockwise until it clicks into place. The lens features identical 0.8mm pitch gears on the focus and aperture rings, allowing for standard cine accessories like follow focus and motor units.
Compatibility: This lens has a native PL mount, making it directly compatible with cinema cameras featuring PL mounts. For use with other camera systems, E-mount and RF-mount adapters are available separately. It covers full-frame and large-format sensors.
Care: The lens is constructed with an all-metal body for durability. Always use the included lens caps when not in use. Clean the lens elements with a soft lens brush or air blower to remove dust, followed by a microfiber lens cloth. Avoid touching the glass elements directly. Store the lens in its custom hard case, which offers protection against extreme temperatures, water, and dust (IP67 rated). Regularly check the lens mount for any debris.