NiSi Athena 25mm T1.9 Cine Lens - Canon RF
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Wex Photo VideoNiSi Athena 25mm T1.9 Cine Lens - Large
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Product Information
Full details
The NiSi Athena 25mm T1.9 Cine Lens for Canon RF is designed for professional cinematographers and videographers who require high-performance optics, consistent field-of-view during focus pulls, and seamless workflow integration. It delivers exceptional image clarity and soft bokeh, making it ideal for narrative filmmaking and high-end video production, though its manual-focus-only operation requires a dedicated focus puller or experienced operator for fast-moving subjects.
All features
| Brand | NiSi |
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Extended Product Information
FAQs
Does this lens support autofocus?
No, the NiSi Athena 25mm T1.9 is a fully manual cinema lens.
Can I use standard screw-in filters with this lens?
The lens features a specialized drop-in filter system; you should use NiSi-compatible drop-in filters for optimal results.
Is this lens weather-sealed?
While built to professional standards, it is not rated as weather-sealed. Avoid exposure to extreme rain or dusty conditions.
Will this lens cover full-frame sensors?
Yes, it is designed for full-frame cinema coverage.
Can I use this on a Canon EF camera?
No, this lens is strictly for Canon RF mount cameras.
How do I read the focal scales in the dark?
The lens features fluorescent markings that glow in low light, making them easy to see during night shoots.
Troubleshooting
Focus ring feels stiff or uneven
Ensure no external debris is caught in the gear rings and check that the follow-focus unit is correctly calibrated.
Image appears soft at T1.9
Check the focus point using magnification on your camera monitor; ensure the lens is securely mounted to the RF flange.
Drop-in filter will not seat correctly
Clear the filter slot of dust or small particulates and ensure the filter is inserted in the correct orientation.
Pros and Cons
Pros
- Exceptional micro-contrast and ultra-low chromatic aberration
- Consistent weight and size across the Athena series for faster lens swaps
- Versatile drop-in filter system simplifies lighting adjustments
- High-precision 300-degree focus rotation for accurate pull focus
- Excellent low-light performance with the wide T1.9 aperture
Cons
- Manual focus only; lacks electronic autofocus integration
- Requires filter inserts specific to the NiSi drop-in system
- Weight may be heavy for handheld mirrorless setups without support
Setup, Compatibility & Care
This lens is designed specifically for Canon RF mount cameras. To set up, ensure the camera mount is clean before clicking the lens into place. Because of the consistent weight profile across the Athena line, once you have balanced your gimbal for one lens, you can generally swap to another prime in the series with minimal recalibration.
Care instructions:
- Always use the provided caps to protect the rear and front elements when not in use.
- Store the lens in a dust-free, humidity-controlled environment.
- Clean the lens glass only with specialized lens cloths and solution.
- Inspect the drop-in filter mount regularly to ensure no debris has entered the internal mechanism.