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Nisi
Nisi 40.5mm Adapter for P49 Filter Holder
Connects a 40.5mm filter to a 49mm lens thread for the NiSi P49 filter system
- Connects 40.5mm filters to 49mm lens threads
- Aluminium alloy construction resists wear on location
- Lightweight ring adds minimal bulk to kit
- Designed for NiSi P49 filter system
- Enables use of wide filter selection
40.5mm Adapter for P49 Filter Holder
The NiSi adapter connects a 40.5mm filter to a lens with a 49mm thread, letting photographers use smaller filters on the P49 filter system. Machined from aluminum alloy, it adds minimal weight and maintains a low profile for travel and everyday shooting. It is aimed at photographers who already own the NiSi P49 holder and want to step down to 40.5mm threads without changing their filter kit.
Who this suits and who should look elsewhere
This adapter suits photographers using the NiSi P49 holder with lenses that have a 40.5mm front thread. It does not help shooters whose lenses use a different thread size, who need to step up to a larger filter diameter, or who work with filter systems other than the P49. Photographers requiring a step-up ring or a different brand mount will need a separate solution.
Thread compatibility: 49mm to 40.5mm step-down
The single specification that decides fit is the thread conversion: the ring accepts a 49mm lens thread and provides a 40.5mm filter thread for the P49 holder. If your lens thread is not 49mm or your filter thread is not 40.5mm, this adapter will not work.
Highlights
- Connects 40.5mm filters to 49mm lens threads
- Aluminium alloy construction resists wear on location
- Lightweight ring adds minimal bulk to kit
- Designed for NiSi P49 filter system
- Enables use of wide filter selection
Specifications
No published specifications for this item yet.
Questions about this item
Will the aluminum threads on this 40.5mm adapter strip or cross-thread after repeated mounting on the P49 holder?
The adapter is machined from aluminum alloy; with normal care the threads resist stripping, but over-tightening or grit on the 49mm lens threads can still cause wear over time.
What is the first limitation you hit when stacking a 40.5mm filter on a 49mm lens via this adapter?
The step-down from 49mm to 40.5mm creates a hard vignetting boundary on wide-angle lenses; that optical cutoff appears before any mechanical limit of the adapter itself.
Does the adapter ring get hot or add noticeable weight during all-day shooting?
Aluminum alloy construction keeps the ring light and thermally neutral; it adds negligible mass and does not retain heat during extended use.
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