Cinema lenses · Athena Prime
NiSi Athena Prime 40mm T1.9
The 40mm in the Athena Prime series: T1.9, between the 35 and the 50mm, with a 46mm image circle covering full frame.
Why choose the 40mm
- T1.9 maximum aperture
- 10 iris blades
- 77mm front thread
- 300° focus rotation
No visible focus breathing
From minimum distance to infinity the framing stays the same: you pull focus while shooting and the field of view doesn’t “breathe”.
T1.9 and 10 blades
Bright in low light, with soft bokeh. High micro-contrast and chromatic aberration kept to a minimum, even wide open.
Designed to work as a set
80mm front diameter, 77mm thread and gears in the same position as the other Athena lenses: swap lenses without rebalancing the gimbal.
300° focus ring
Fluorescent scales for precise focus pulls, even in the dark.
Technical specifications
- Focal length and aperture
- 40mm, T1.9
- Format
- full frame, 46mm image circle
- Blades
- 10
- Focus rotation
- 300°
- Gears
- 0.8 MOD, 32 pitch
- Front filters
- 77mm
- Front diameter
- 80mm
Frequently asked questions
Which drop-in filters are included?
The E, RF and L versions come with the clear drop-in filter only. Drop-in NDs and polarisers are sold separately; for the PL mount there are rear filters.
Can I use it with other Athena lenses in the same set-up?
Yes. Weights, dimensions and gear positions match across the whole series. The 40mm is also in the Add-On Kit and the Master Kit.
Can I change mount in the future?
The PL version adapts to other mounts with the Athena and Aureus PL mount adapters (E, RF, L, DJI DX, GFX, Z, XCD).
