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Circular metal adapter ring with knurled edge, matte black finish, 105mm thread marking

Nisi

Nisi 105mm Alpha Adapter for S5 S6 150mm Filter Holders

SKU CH-A0AQ-8CRRS

Connects 105mm threaded lenses to NiSi S5 or S6 150mm filter holders, with optional 62, 77, 82 and 95mm adapters available

  • Connect 105mm lenses to S5/S6 holders
  • Convert ultra-wide holders for standard filter threads
  • Durable aluminium alloy construction
  • Optional step-up adapters for 62/77/82/95mm threads
  • Note: circular polarizers incompatible with this adapter

105mm Alpha Adapter for S5 and S6 Holders

This aluminium adapter connects a 105mm lens thread to NiSi S5 or S6 series 150mm filter holders. It is designed for photographers and videographers who want to use their existing square-filter system on ultra-wide lenses with standard front threads. The ring is sold separately from the holder frame, which is required for operation.

Sustained use and vignetting control

The adapter maintains a lightweight profile during extended shooting sessions without adding significant bulk to the front of the lens. Its precise machining ensures a secure, light-tight fit between the lens and holder, preventing flare during long exposures. The low-profile design minimises the risk of vignetting on compatible ultra-wide focal lengths.

Thread compatibility limits

This adapter accepts only 105mm front threads directly; step-up rings for 62mm, 77mm, 82mm and 95mm lenses are sold separately. When fitted, the holder cannot accommodate NiSi S5 or S6 circular polarizers or other circular filters designed for those frames. The system remains limited to square or rectangular filters within the 150mm holder format.

How it compares

Measured against everything we stock in Lens Filters & Polarizers, at today’s prices. Recalculated every night.

Price $49.99
Typical for this category: the median of 1,281 items is $48.99.

Specifications

No published specifications for this item yet.

Questions about this item

Does the 105mm Alpha Adapter add noticeable weight or heat during long shoots?

The adapter is made from lightweight aluminium alloy and has no electronics, so it adds no heat and negligible mass during all-day use.

What existing NiSi gear must I already own for this adapter to function?

You need a NiSi S5 or S6 150mm filter holder frame; the adapter ring alone cannot mount filters.

Will my older NiSi S5 or S6 circular polariser still fit when this 105mm adapter is attached?

No — the adapter prevents the holder from accepting any NiSi S5 or S6 circular polariser or other circular S5/S6 filters.

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