How to Install the NiSi V7 100mm Filter Holder System

Quick answer

Screw the correct adapter ring onto your lens first, then clip the V7 holder onto that ring and rotate it to confirm smooth movement. Slide your 100mm square filters into the holder slots one at a time, and lock the holder before you attach a magnetic filter. The most common failure is mounting the holder before the adapter ring is fully seated.

Match the adapter ring to your lens thread

The V7 holder itself does not screw onto a lens. It mounts to an adapter ring, and that ring must match your lens filter thread exactly. Check the thread size printed on your lens barrel or inside the front cap, then fit the corresponding ring. If you plan to use the holder across several lenses, buy a separate ring for each thread size rather than swapping one ring between lenses in the field.

Seat the adapter ring fully before anything else

Thread the ring on by hand and turn until it stops with light resistance. Do not force it past that point. A ring that is cross-threaded or only partly engaged will sit at an angle, and the V7 holder will feel stiff or refuse to rotate. This is the single most common installation mistake, and it is easy to avoid by checking the ring is flush against the lens front before continuing.

Attach the V7 holder and test rotation

With the ring seated, align the holder and push it onto the ring until it clicks or seats firmly. Rotate the holder through its full range before adding filters. It should turn smoothly without catching. If it binds, remove the holder, recheck the ring seating, and try again. Testing rotation now saves you from discovering a problem after you have loaded two or three filters.

Load 100mm square filters and lock the holder

Slide each 100mm square filter into its slot, pushing it down until it sits level. Load the filter you will adjust most often, such as a graduated ND, in the slot closest to the lens. Once the filters are in place, tighten or lock the holder so it cannot shift when you rotate it. A loose holder lets filters creep out of position mid-exposure.

Add magnetic filters last

If you are stacking a magnetic filter on top of the square filter system, attach it after the holder is locked and the square filters are seated. Magnetic filters snap on and off quickly, so they are best added at the end to avoid knocking the holder out of alignment. Keep the magnetic filter clean and check that it sits flat against the holder before you shoot.

V7 installation steps and checkpoints

1. Fit the correct adapter ring: Match the ring to your lens filter thread and thread it on by hand until it stops with light resistance. Checkpoint: the ring should sit flush against the lens front with no gap or tilt.
2. Mount the V7 holder: Push the holder onto the seated ring until it seats firmly, then rotate it through its full range. Mistake to avoid: forcing a stiff holder instead of reseating the ring.
3. Load square filters: Slide each 100mm filter into its slot until level, placing the most-adjusted filter closest to the lens. Checkpoint: no filter should protrude unevenly or sit at an angle.
4. Lock the holder: Tighten or lock the holder so it cannot shift when you rotate it during a shot. Mistake to avoid: leaving the holder loose so filters creep out of position.
5. Attach magnetic filters last: Snap on any magnetic filter after the holder is locked and the square filters are seated. Checkpoint: the magnetic filter should sit flat and not disturb the holder alignment.

Products that pair with the V7 holder

• NiSi JetMag Pro 77mm-95MAG Magnetic Adaptor Ring: Adapts 95MAG JetMag Pro filters to lenses with a 77mm thread size, with a slim profile that prevents vignetting. If your lens has a 77mm thread, this ring lets you use the same 95MAG magnetic filters you might already own alongside your V7 square filter system.
• NiSi JetMag Pro FS ND64(1.8) 95MAG Magnetic Filter (6 Stop): 6-stop full spectrum ND with magnetic quick installation and a patented locking design to keep the filter secure. A 6-stop ND is a practical starting point for long exposures in bright light, and the locking design means it stays put when you rotate the holder.