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A Leica rangefinder with a NiSi JetMag Pro 49MAG filter fitted, on a wooden table

JetMag Pro 49MAG

Magnetic filters
for smaller lenses.

Snap on, twist to lock, and carry every look in a pocket. Built for compacts, rangefinders and small primes with 39mm to 49mm filter threads.

  • 15 filters
  • 5 thread sizes
  • 1 twist to lock
Shop 49MAG

Learn the system

Build your kit

Start with a kit, or pick your looks.

Two kits cover the classic jobs and come with rings, caps and a bag, or pick single filters for exactly the looks you want.

NiSi JetMag Pro Landscape Filter Kit 49MAG with ND filters, CPL, adaptor rings, caps and bagLandscape

Landscape Filter Kit

Three ND filters and a polarizer, for moving water, long exposures and cleaner skies.

4filters

In the box

  • FS ND8 (3 stop)
  • FS ND64 (6 stop)
  • FS ND1000 (10 stop)
  • True Color CPL
  • 40.5mm, 43mm, 46mm and 49mm adaptor rings
  • Front cap, back cap and filter bag

Best for: landscapes, water and long exposures on a compact or rangefinder.

Shop the kit
NiSi JetMag Pro Monochrome Filter Kit 49MAG with yellow, orange and red filters, adaptor rings, caps and bagBlack and white

Monochrome Filter Kit

Yellow, orange and red filters that darken skies and lift clouds in black and white.

3filters

In the box

  • Yellow
  • Orange
  • Red
  • 39mm, 46mm and 49mm adaptor rings
  • Front cap, back cap and filter bag

Best for: black and white shooters who want more drama in the sky.

Shop the kit

Find your ring

One ring per lens.

Pick the ring that matches your lens thread. It stays on the lens, and every 49MAG filter snaps onto it.

39mmto 49MAG 40.5mmto 49MAG 43mmto 49MAG 46mmto 49MAG 49mmto 49MAG

Not sure of your thread? It is printed on the front of the lens or inside the cap, next to the diameter symbol. Add a front cap, back cap and Caddy Pouch to carry the set.

How it works

Three moves, then shoot.

The ring stays on the lens. Everything after that takes a second.

Fit the ring

Thread a 49MAG adaptor ring onto the lens and leave it there. Rings come in 39mm, 40.5mm, 43mm, 46mm and 49mm.

Snap the filter on

The magnets pull the filter square onto the ring in about a second.

Twist to lock

Turn until the handle meets the white line. The filter is now locked, not just held by magnets.

Why 49MAG

Every look, pocket sized.

The full JetMag Pro system, scaled down for the cameras you actually take everywhere.

01 / 07

Snap on in seconds

Strong magnets pull each filter square onto the adaptor ring, so it goes on or comes off in a second and you can keep up with the light.

A 49MAG filter being snapped onto a Leica lens

02 / 07

Locked on tight

Twist the filter until its handle meets the white line on the adaptor and a mechanical lock engages. Fast movement and a knock in the bag will not shift it.

Twisting a 49MAG filter to lock it on a Leica lens

03 / 07

A color for every look

Each filter type has its own colored handle, so you can find the one you want at a glance and fit it by feel, even in low light.

A stack of 49MAG filters with colored handles held in one hand

04 / 07

One filter, many lenses

Fit an adaptor ring to each lens, in 39mm, 40.5mm, 43mm, 46mm or 49mm, and the same filter moves between them in seconds. No step-up rings.

Fitting a 49MAG adaptor ring to a Fujifilm X-T4 lens

05 / 07

Every creative look

True Color CPL, Full Spectrum ND, Black Mist, Pure Mist, Film Glow, HDF, Cross Screen and yellow, orange and red for black and white, all on one magnetic system.

The full range of 49MAG filters laid out on white

06 / 07

Built for the field

Optical glass with NiSi nano coatings repels water, oil and fingerprints, in slim aluminum frames made for real days out.

A Leica rangefinder with a 49MAG filter resting on rocks

07 / 07

Fits in your pocket

Slim filters, magnetic caps and the Caddy Pouch pack the whole system small enough to carry every look without a filter case.

A stack of 49MAG filters slipping into a jeans pocket

Filter on and off

See what each filter does.

The same scene with and without the filter, shot on the 49MAG system.

True Color CPL

Cuts the glare on the water and deepens the sky, without a color cast.

River and bridge photographed without a polarizer
River and bridgeNo filter
The same river and bridge with a NiSi True Color CPL fitted
River and bridgeTrue Color CPL

FS ND8, 3 stop

A slower shutter in daylight, so the walking figure blurs.

A walkway photographed without a neutral density filter
WalkwayNo filter
The same walkway with a NiSi FS ND8 fitted, the walking figure blurred
WalkwayFS ND8

Film Glow Diffusion 1/4

Blooms the neon and softens highlights for a less digital look.

A portrait at a neon-lit bar photographed without a diffusion filter
Neon portraitNo filter
The same portrait with a NiSi diffusion filter blooming the neon
Neon portraitFilm Glow 1/4

Yellow, orange and red

The same black and white skyline: each filter darkens the sky a step further.

City skyline in black and white with no color filter
SkylineNo filter
The same skyline with a yellow filter
SkylineYellow
The same skyline with an orange filter
SkylineOrange
The same skyline with a red filter
SkylineRed

Questions

Before you buy.

Which lenses does 49MAG fit?

Any lens with a 39mm, 40.5mm, 43mm, 46mm or 49mm filter thread, using the matching adaptor ring. That covers many rangefinder lenses, small mirrorless primes and compact camera lenses.

How do I find my filter thread?

Look for the diameter symbol on the front of the lens or inside the lens cap, followed by a number in millimeters. That number is the adaptor ring you need.

Do I need a ring for every lens?

Yes, one ring per lens, and it stays on the lens. The filters then move freely between every lens that has a ring.

What comes in the kits?

The Landscape Filter Kit has FS ND8, FS ND64, FS ND1000 and a True Color CPL, with 40.5mm, 43mm, 46mm and 49mm rings. The Monochrome Filter Kit has yellow, orange and red filters with 39mm, 46mm and 49mm rings. Both include a front cap, back cap and filter bag.

Will the filters stay on?

Yes. The magnet holds the filter while you seat it, then a twist to the white line locks it mechanically. Stacked filters lock to each other the same way.

How do I carry them?

The filters stack with magnetic front and back caps into a puck small enough for a pocket, and the Caddy Pouch holds the set.

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