Quick answer

Choose the DZOFilm Arles if you need the extra stop of light and shoot in low light or want shallow depth of field; its T1.4 and 46.5mm image circle cover full-frame and Vista Vision. Choose the NiSi ATHENA PRIME if you want a proven cinema prime with a 300-degree focus throw and a 77mm filter thread, and you can work with T2.2. Both are PL mount and available from Filmgear Canada.

Speed and low-light performance

The DZOFilm Arles 50mm T1.4 and 18mm T1.4 are a full stop faster than the NiSi ATHENA PRIME 18mm T2.2. That extra stop can mean the difference between shooting at ISO 1600 and ISO 3200, or between a practical light and a small fixture. It also gives you a shallower depth of field at the same framing, which is useful for subject separation in interviews or narrative close-ups.

The NiSi ATHENA PRIME 18mm T2.2 is not a slow lens, but T2.2 requires more light or a higher ISO. If your work is mostly lit or you shoot on a camera with strong low-light performance, the speed difference may not justify the price gap.

Image circle and sensor coverage

Both lenses cover full-frame, but the DZOFilm Arles specifies a 46.5mm image circle, which also covers Vista Vision. The NiSi ATHENA PRIME specifies a 46mm image circle. That 0.5mm difference is unlikely to matter on most full-frame sensors, but if you shoot Vista Vision or need extra room for stabilization or cropping, the Arles gives you a little more margin.

Neither lens is designed for larger formats like ARRI 65 or full-frame anamorphic, so check your camera's sensor size before buying.

Mechanics and workflow

The NiSi ATHENA PRIME 18mm T2.2 has a 300-degree focus rotation, which is longer than many stills-style lenses and can make precise focus pulls easier. It also has a 77mm filter thread and an 80mm front diameter, so you can use screw-on filters and common matte box setups without step-up rings. The rear filter holder is a bonus for ND or diffusion without adding front glass.

The DZOFilm Arles 18mm T1.4 uses a shared 95mm front diameter and 0.8 MOD gearing across the Arles range. That consistency matters if you swap between focal lengths on a follow focus or matte box. The Arles 50mm T1.4 shares the same mechanics, so you can build a matched set.

If you already own NiSi ATHENA PRIME lenses, adding the 18mm keeps your kit consistent. If you are starting fresh, the Arles system offers a wider range from 14mm to 180mm, which may reduce the need to mix brands.

Price and value

At Filmgear Canada, the NiSi ATHENA PRIME 18mm T2.2 is listed at USD 1236.92, while the DZOFilm Arles 18mm T1.4 is USD 2466.74 and the Arles 50mm T1.4 is USD 1722.97. The Arles lenses cost more, but you get the faster T1.4 aperture and, for the 18mm, a slightly larger image circle.

If budget is tight and you do not need T1.4, the NiSi ATHENA PRIME is a practical choice. If you need speed and are building a matched set, the Arles investment may pay off in flexibility.

Trade-offs to weigh

  • Aperture vs price: The DZOFilm Arles T1.4 gives you a full stop more light than the NiSi ATHENA PRIME T2.2, but the Arles 18mm costs roughly twice as much. If you rarely shoot wide open, the NiSi may be the better value.
  • Image circle vs sensor: The Arles covers 46.5mm (Vista Vision), while the NiSi covers 46mm. Both cover full-frame, but the Arles gives slightly more room. Only a factor if you use Vista Vision or need extra crop room.
  • Mechanics and accessories: NiSi offers a 77mm filter thread and 80mm front, while Arles uses a shared 95mm front and 0.8 MOD gearing across the range. Choose based on your existing matte box, follow focus, and filter kit.

Key specs at a glance

  • NiSi ATHENA PRIME 18mm T2.2 Full-Frame Lens (PL Mount): NiSi ATHENA PRIME 18mm T2.2: PL mount, 46mm image circle, 300-degree focus rotation, 77mm filter thread, 80mm front diameter, rear filter holder. The long focus throw and standard filter thread make it easy to use with follow focus and screw-on filters, while the rear filter holder adds flexibility for ND.
  • DZOFilm Arles 50mm T1.4 FF/VV Prime Cine Lens (ARRI PL): DZOFilm Arles 50mm T1.4: PL mount, 46.5mm image circle covering full-frame and Vista Vision, manual focus, matched Arles mechanics. The T1.4 aperture and Vista Vision coverage give you more light and a wider format option, and the matched mechanics simplify swapping lenses on set.
  • DZOFilm Arles 18mm T1.4 FF/VV Prime Cine Lens (ARRI PL): DZOFilm Arles 18mm T1.4: PL mount, 46.5mm image circle, shared 95mm front diameter and 0.8 MOD gearing across the Arles range. The consistent front diameter and gearing mean you can use the same matte box, follow focus, and accessories across all Arles focal lengths.

Which lens is right for you?

Best for

  • Shooters who need T1.4 for low light or shallow depth of field
  • Productions that want a matched set from 14mm to 180mm with consistent front diameter
  • Vista Vision or full-frame users who want extra image circle margin

Not for

  • Budget-conscious buyers who can work with T2.2
  • Owners of NiSi ATHENA PRIME kits who want to keep their existing filter and matte box setup
  • Shooters who need a lightweight, compact prime for gimbal work