The NiSi S6 holder kit is a dedicated filter holder system designed specifically for the Sigma 14-24mm F2.8 DG, letting you use large-format rectangular filters on an ultra-wide prime without vignetting or light leaks. Note: filters themselves are not included — this kit covers the holder body and the mount-specific adapter ring only.
What's in the kit?
The S6 kit includes the S6 holder body and the specific adapter ring engineered to fit the Sigma 14-24mm F2.8 DG's unusual front element. Because NiSi builds mount-specific adapters, the fit is snug and precise — no improvised step-rings needed. Filters (ND, GND, polariser) are sold separately.
What is the NiSi S6 filter holder system?
The NiSi S6 is a large-format rectangular filter holder designed for ultra-wide lenses whose bulging front elements make screw-on filters impossible. It uses a lens-specific adapter ring that locks directly onto the front of the lens, and the holder body slots large-format rectangular filters in front of that. The system is a recognised solution among landscape and architecture photographers who shoot on super-wides.
Compatibility & filter system
This kit is matched to the Sigma 14-24mm F2.8 DG. The adapter ring is not interchangeable with other lens mounts without purchasing the corresponding NiSi ring for that lens. If you own multiple ultra-wides, NiSi does sell additional adapter rings separately so you can share one holder body across lenses.
Who is this for?
If you shoot landscapes, architecture or long exposures on a Sigma 14-24mm F2.8 DG, screw-on filters simply aren't an option on a bulging front element like this. The S6 system is the practical answer: slot in an ND, a GND or a polariser and you're good to go. Buying a used S6 kit is a smart way to get into NiSi's system at a lower entry cost while still getting the same precise fit as new.
Condition & warranty
Every second-hand NiSi S6 holder kit on Camera-tweedehands.nl is individually inspected and graded — the condition tier (e.g. Excellent, Very Good, Good) is shown on the variant listing, so you know exactly what you're getting. All pre-owned items come with a minimum 12 months warranty; the exact period is shown on the variant listing.
