NiSi Cine Lens Set Athena Prime Add-On (3 Lenses) E-Mount (Without Drop-In Filter)

NiSi Athena Prime Add-On (E‑Mount) – 3 Lenses (18mm, 40mm, 135mm) Without Drop-In Filter for versatile focal coverage

This NiSi Athena Prime Add-On kit for E‑Mount contains three cinema primes designed for filmmakers who need matched optics across a practical focal range. The set includes 18mm, 40mm and 135mm lenses in the E‑Mount configuration without the Drop‑In filter option. Each lens maintains the same mechanical layout and matching control scales to simplify lens changes on set.

Key optical characteristics and apertures

The Athena Prime series uses T‑stop ratings to state actual light transmission, helping you maintain consistent exposure between lenses. In this add‑on kit the three included lenses have the following maximum T‑stops:

• 18mm — T2.2
• 40mm — T1.9
• 135mm — T2.2

Using T‑stops ensures consistent exposure readings across focal lengths and aids in accurate exposure control during production.

Image circle and sensor compatibility

These Athena Primes produce an image circle of 46mm. That image circle makes them suitable for full‑frame sensors and compatible with many large‑format cameras that can be covered by a 46mm image circle.

Mounts, drop‑in filtration and important notes

The Athena Prime series is available in multiple mounts across the full lineup: ARRI PL, Canon RF, Sony E, Panasonic/Leica L and Fuji G. The series features a proprietary rear filtration system with Drop‑In filter capability on selected mounts.

• RF, L and G mounts offer a Drop‑In filter option.
• E‑Mount lenses are available in two versions: with Drop‑In filter and without Drop‑In filter. This kit is the E‑Mount version without the Drop‑In filter.
• PL‑mount lenses use a rear filter solution.

Note the following important compatibility points:

• Sony FX9 camera cannot use the E‑Mount with Drop‑In filters!
• To achieve infinity focus and clear images, use the Drop‑In clear filter on RF, L, G and E mounts where applicable, and use the rear filter on PL‑mount lenses.

NiSi also supplies weather sealing for the Drop‑In filter when that option is used, helping protect the rear filtration area in challenging conditions.

Consistency, handling and mechanics

NiSi designed the Athena Primes to behave consistently across the range. All Athena Prime lenses are similar in weight, which means you typically do not need to rebalance your gimbal when switching between Athena lenses. Aperture and focus rings are matched across the series so follow‑focus moves and exposure adjustments remain predictable when you swap lenses.

Mechanical and focus details include:

• Focus rotation of 300° for accurate, repeatable focus pulls.
• Fluorescent focus scales displayed in both imperial and metric units for easy reading under various lighting conditions.
• Standard 0.8 mod gears on both focus and iris for compatibility with most follow‑focus and matte box systems.
• All lenses in the series (except the 14mm) share a 77mm front filter thread.

Accessories and optional items

NiSi offers an optional 77mm close‑up lens that can reduce minimum focus distance to enable macro effects; this close‑up lens is sold separately. The add‑on kit itself includes a hard case sized for storing multiple Athena lenses.

This kit includes

• 1x NiSi Athena Prime 18mm T2.2 E‑Mount (Without Drop‑In Filter)
• 1x NiSi Athena Prime 40mm T1.9 E‑Mount (Without Drop‑In Filter)
• 1x NiSi Athena Prime 135mm T2.2 E‑Mount (Without Drop‑In Filter)
• 1x NiSi Hardcase for 9pcs NiSi Athena Lenses

Technical specifications

Frequently Asked Questions

Question: Which lenses are included in this NiSi Athena Prime Add‑On kit for E‑Mount?
Answer: This E‑Mount add‑on kit includes the 18mm T2.2, 40mm T1.9 and 135mm T2.2 Athena Prime lenses, plus a hard case sized for nine Athena lenses.

Question: Does this kit include the Drop‑In filter version for E‑Mount?
Answer: No. This specific kit is the E‑Mount version without the Drop‑In filter. NiSi also sells E‑Mount lenses in a Drop‑In version, but this listing is the non‑Drop‑In variant.

Question: Can I use these lenses on a camera with a large‑format sensor?
Answer: The Athena Primes produce a 46mm image circle, which is suitable for full‑frame and can cover many large‑format sensor applications that fall within that image circle specification.

Question: Will swapping between Athena lenses require gimbal rebalancing?
Answer: The Athena Prime lenses are similar in weight and share matched mechanical designs, so you typically do not need to rebalance your gimbal when switching between Athena lenses.

Question: Are there any compatibility warnings I should be aware of?
Answer: Yes. The Sony FX9 cannot use the E‑Mount with Drop‑In filters. Also, to reach infinity focus and obtain clear images you must use the Drop‑In clear filter where required (RF, L, G and applicable E‑Mount versions) and the rear filter on PL‑mount lenses.