NiSi Cine Lens Athena Prime 85mm T1.9 E-Mount (Without Drop-in Filter)

NiSi Athena Prime 85mm T1.9 E-Mount – T1.9 aperture and 46mm image circle (Without Drop-In Filter)

This listing describes the NiSi Athena Prime 85mm in Sony E-Mount, featuring a T1.9 maximum aperture and a 46mm image circle. This E-mount version is supplied without the Drop-In filter system.

Designed for versatile cinematic shooting

The Athena Prime series spans focal lengths from 14mm to 135mm, covering ultra-wide to portrait ranges. Consequently, the 85mm fits into a matched family of lenses that lets filmmakers switch focal lengths while keeping consistent rendering and handling.

Because the series covers many common cinematic focal lengths, you can use the 85mm alongside other Athena primes for a broad range of shooting scenarios without changing your visual character or ergonomics.

Optical characteristics and aperture

The Athena primes deliver controlled micro-contrast and ultra-low chromatic aberration to preserve fine image details. Specifically, the 85mm shares the series’ T-stop characteristics: some focal lengths reach T1.9, while others are slightly slower. The specific T-stop distribution in the series is listed in the specifications table below.

Mounts, filter systems and important notes

The Athena series is available in ARRI PL, Canon RF, Sony E, Panasonic/Leica L and Fuji G mounts. Some mounts include a Drop-In filter option, while others use a rear filter solution. The E-Mount is offered in two variants: with Drop-In filter or without Drop-In filter. This particular product is the E-Mount version without the Drop-In filter.

Please note the manufacturer guidance: to achieve infinity focus and clear images, use the Drop-In clear filter on RF, L, G and E mounts where that Drop-In option is fitted, and use the rear filter on PL-mount lenses. Also note that the Sony FX9 cannot use the E-Mount with Drop-In filters.

NiSi provides weather sealing for the Drop-In filter option where applicable.

Handling, balance and accessories

The Athena primes are designed with matched weight and balance across the set. As a result, the 85mm maintains similar weight to the other lenses in the series, so you typically do not need to rebalance a gimbal when you swap between Athena lenses.

All lenses in the series, except the 14mm, share a 77mm filter thread. Aperture and focus ring positions and feel are matched across the range for consistent operation during lens changes.

Focus mechanics and professional control

The Athena primes have been engineered to minimize focus breathing, keeping field-of-view changes very small when pulling focus from minimum focus distance to infinity. The lenses feature a long 300° focus rotation and fluorescent focus scales marked in both imperial and metric units for precise focus pulls under varied lighting conditions.

Furthermore, the lenses use standard 0.8 mod focus and iris gears, ensuring compatibility with a wide range of follow focus systems and matte boxes used in professional workflows.

Optional close-up and macro capability

For closer focusing and macro-style effects, NiSi offers a 77mm close-up lens that reduces minimum focus distance. This accessory is sold separately and is compatible with Athena primes that accept 77mm front filters.

FAQ

Question: Does this E-Mount 85mm include the Drop-In filter system?
Answer: No. This listing is for the Sony E-Mount 85mm version without the Drop-In filter system. The Athena series offers E-Mount lenses in two variants, one with Drop-In and one without.

Question: Will I need to rebalance my gimbal when switching to this lens from another Athena prime?
Answer: In most cases you will not need to rebalance. The Athena primes are similar in weight across the series, specifically designed so that swapping lenses does not require rebalancing on a gimbal.

Question: Can I use front filters with this lens and are there close-up options?
Answer: Yes. Except for the 14mm, Athena primes share a 77mm front filter thread. Additionally, NiSi offers a 77mm close-up lens (sold separately) to reduce minimum focus distance for macro-style images.

Question: Are there any compatibility warnings I should know about?
Answer: Yes. The manufacturer warns that the Sony FX9 cannot use the E-Mount version that includes Drop-In filters. Also, to achieve infinity focus and clear images, NiSi advises using the Drop-In clear filter on mounts that support it (RF, L, G and E where fitted) and the rear filter on PL-mount lenses.

If you have further questions about compatibility, accessories or which Athena variant fits your camera, contact us and we will source the correct version for your setup.