NiSi JetMag Pro Magnetic Filter System: Buyer's Guide

Quick answer

Buy the largest thread size your lens collection needs, then add adaptor rings for smaller lenses. If you shoot wide-angle landscapes with graduated ND filters, start with the NiSi JetMag Pro 100mm Filter Holder Kit for 82MAG. If you mainly shoot portraits or video and want diffusion, the NiSi JetMag Pro Black Mist Kit 82MAG is the more useful first purchase. For a single screw-in magnetic ND, match the filter size to your lens thread: 95MAG for 95mm threads, 49MAG for 49mm threads.

How the JetMag Pro magnetic system actually works

JetMag Pro filters attach magnetically to a dedicated adaptor ring that screws onto your lens thread. A patented locking mechanism keeps the filter in place during shooting, so you are not relying on magnet strength alone. The system is modular: the same filter can move between lenses if you have the correct adaptor ring for each thread size.

The main practical benefit is speed. You can swap a 3-stop ND for a 6-stop ND without unscrewing anything, which matters when light is changing quickly at sunrise or sunset. The trade-off is that each lens needs its own adaptor ring, and the largest thread size you own determines which MAG family you should buy into.

Measure your lens thread before choosing a MAG size

The three JetMag Pro families are sized by the adaptor ring thread, not by the filter's effect. 82MAG fits lenses with an 82mm front thread. 95MAG fits 95mm threads. 49MAG fits 49mm threads. If your lens has a different thread, you need a step-up ring or a different adaptor ring, and that decision should come before you choose a filter.

A common mistake is buying a 49MAG filter because it is the least expensive, then discovering it cannot be adapted to an 82mm lens without a step-up ring that may cause vignetting. Go the other way: buy for your largest thread, then step down to smaller lenses with adaptor rings. The 82MAG system is the most flexible starting point for mixed kits because it covers the common 82mm, 77mm, 72mm and 67mm thread sizes via adaptors.

When the 82MAG filter holder kit is the right first purchase

If you use graduated ND filters for landscapes, the NiSi JetMag Pro 100mm Filter Holder Kit for 82MAG solves a problem that screw-in filters cannot: aligning a hard or soft grad to a horizon. The kit includes the 100mm holder and the 82MAG magnetic adapter ring, and it accepts all standard 100mm wide square filters, including graduated ND. The holder rotates 360 degrees so you can set the grad angle precisely.

The trade-off is bulk. A 100mm holder system is larger than a single magnetic ND filter, and it only makes sense if you actually shoot with square filters. If you never use a graduated ND, the holder kit adds weight and setup time for no benefit. In that case, buy individual JetMag Pro magnetic ND filters instead.

Choosing between 3-stop and 6-stop magnetic ND filters

Stop count is the decision that most affects your results. A 3-stop filter is the general-purpose choice for bright conditions and for bringing a fast lens into a usable aperture range. A 6-stop filter is for longer exposures: smoothing water, adding cloud movement, and extending shutter times around sunrise, sunset, and bright overcast conditions. If you shoot both, the 3-stop and 6-stop pair covers most situations without stacking.

Both the NiSi JetMag Pro FS ND8(0.9) 95MAG and the NiSi JetMag Pro FS ND64(1.8) 49MAG use Full Spectrum ND technology, which is designed to deliver neutral color without a color cast. That matters because cheaper ND filters often introduce a warm or green tint that has to be corrected in editing. The 49MAG version uses blue-colored handles to make the FS series easy to identify in a bag.

Black Mist is a different purchase, not a replacement for ND

Black Mist filters soften light for a dreamy, cinematic look without losing sharpness, and they are most useful for portrait and cinematic work where you want softer skin tones and atmospheric highlights. They do not reduce exposure, so they are not a substitute for an ND filter. If your goal is long exposures, buy ND first. If your goal is a softer look in bright conditions, you may eventually want both, and the Black Mist kit includes 1/8 and 1/4 strengths so you can compare the effect.

Decision rules for buying into JetMag Pro

• Rule 1: Match the MAG number to your largest lens thread: 82MAG for 82mm, 95MAG for 95mm, 49MAG for 49mm. If your largest lens is 82mm, buy 82MAG and use adaptor rings for smaller lenses rather than buying a smaller system and stepping up. Check the thread printed on your lens cap before ordering.
• Rule 2: Buy the holder kit only if you use graduated ND: The 100mm holder kit adds size and setup steps that are wasted if you never align a grad to a horizon. For pure ND work, individual magnetic filters are faster and lighter. No graduated ND in your bag means skip the holder kit.
• Rule 3: Pick stop count by shutter speed goal, not by price: A 3-stop ND is for bright-light exposure control. A 6-stop ND is for smoothing water and extending exposures. If you cannot describe the shutter speed you want, start with 3 stops and add 6 stops later. Two NDs beat one ND plus a stack of step-up rings.
• Rule 4: Treat Black Mist as a separate creative tool: Black Mist softens light for portraits and cinematic footage but does not cut exposure. Do not buy it expecting ND behavior, and do not buy ND expecting diffusion. Decide whether your next purchase is exposure control or look.

Product facts that affect your decision

• NiSi JetMag Pro 100mm Filter Holder Kit for 82MAG (Filter Holder + 82MAG Adaptor Ring): Includes a 100mm holder and an 82MAG magnetic adapter ring, and is compatible with all standard 100mm wide square filters, including Graduated ND. This is the only item here that lets you use a graduated ND with precise horizon alignment, so it is the correct choice if grad filters are part of your workflow.
• NiSi JetMag Pro Black Mist Kit 82MAG Magnetic Filter Kit (Black Mist 1/4, Black Mist 1/8, 67mm/72mm/77mm/82mm Adaptors, Two Front Caps, Back Cap, Caddy Pouch): Includes Black Mist 1/8 and 1/4 filters plus 67mm, 72mm, 77mm and 82mm adaptors, two front caps, a back cap, and a caddy pouch. The multi-size adaptor set makes this a one-purchase diffusion kit for several lenses, but it does not replace an ND filter for exposure control.
• NiSi JetMag Pro FS ND8(0.9) 95MAG Magnetic Filter (3 Stop): 3-stop light reduction with Full Spectrum ND technology, magnetic quick installation, and an ultra-slim frame designed to avoid vignetting even with wide-angle lenses. A good first ND if you mostly shoot in bright conditions and want a neutral color result without a bulky holder.
• NiSi JetMag Pro FS ND64(1.8) 49MAG Magnetic Filter (6 Stop): 6-stop light reduction with Full Spectrum ND technology, blue-colored handles, and a design aimed at smoothing water and extending exposures around sunrise, sunset, and bright overcast conditions. Choose this over the 3-stop version when your priority is long-exposure effects rather than general exposure control.

Who should buy which JetMag Pro setup

Best for

• Landscape photographers who use graduated ND filters and need 360-degree rotation for horizon alignment
• Shooters with an 82mm lens thread who want to add smaller lenses later with adaptor rings
• Portrait and video creators who want Black Mist 1/8 and 1/4 diffusion across 67mm to 82mm lenses
• Photographers who want a single neutral 3-stop or 6-stop magnetic ND without a holder system

Not for

• Photographers who never use graduated ND filters and would be better served by individual magnetic ND filters
• Lenses with thread sizes outside 49mm, 82mm and 95mm unless you already own the correct step-up or adaptor ring
• Anyone expecting a Black Mist filter to reduce exposure like an ND filter
• Buyers who want one filter to cover every lens without buying any adaptor rings