NiSi JetMag Pro Magnetic Filter Adapter Ring Setup
By District Camera | Published: 2026-10-30
Category: How-to Guides
Learn how to mount NiSi JetMag Pro magnetic filters on a 49mm lens using the 67MAG adapter ring, with step-by-step instructions and common pitfalls to avoid.
Quick Answer
To use NiSi JetMag Pro magnetic filters on a 49mm lens, screw the 67MAG adapter ring onto the lens thread, then attach your magnetic filter. Ensure the ring is fully tightened and the filter is centered for a secure fit.
Why Use a Magnetic Filter Adapter?
Magnetic filter systems speed up your workflow by letting you swap filters in seconds without threading each one. The NiSi JetMag Pro 67MAG adapter ring bridges the gap between your 49mm lens and the larger 67MAG magnetic filter series, so you can use the same filters across multiple lenses.
The adapter is machined from durable aluminum, which keeps it lightweight while providing a secure, reliable connection. That matters because a loose or poorly fitted ring can cause vignetting or even let the filter drop off mid-shoot.
Compatibility and Limitations
This adapter is designed specifically for lenses with a 49mm filter thread. If your lens has a different thread size, you'll need a different adapter or a step-up ring, which may affect the magnetic connection.
Because the adapter adds a few millimeters of thickness, it can introduce vignetting on wide-angle lenses, especially when stacking multiple filters. Test at your widest focal length before relying on it in the field.
Step-by-Step Setup
- Align the adapter ring: Hold the 67MAG adapter ring so its threaded side faces the front of your lens. Gently place it on the 49mm filter thread, making sure it sits flat and does not cross-thread. If the ring does not screw on smoothly, remove it and realign; forcing it can damage the threads.
- Tighten the ring securely: Rotate the adapter ring clockwise until it is snug against the lens. Do not over-tighten—just enough to prevent wobble. Check that the ring is fully seated before attaching any filter; a loose ring can cause light leaks.
- Attach the magnetic filter: Bring your 67MAG JetMag Pro filter close to the adapter ring until the magnets pull it into place. Ensure the filter is centered and flush with the ring. If the filter feels off-center, remove and reattach; a misaligned filter can cause uneven sharpness or vignetting.
- Test for vignetting: Set your lens to its widest focal length and take a test shot. Review the image for dark corners, especially if you are stacking multiple filters. If vignetting appears, consider using a thinner filter or removing the adapter when not needed.
- Store and maintain: When not in use, remove the filter and keep the adapter ring on the lens or store it in a padded pouch. Clean the threads occasionally with a soft brush to remove dust. Keep the magnetic surfaces free of debris to maintain a strong, reliable connection.
Product Facts
- NiSi JetMag Pro 67MAG Magnetic Filter Adapter Ring (49mm): The NiSi JetMag Pro 49mm-67MAG Adaptor Ring allows you to attach 67MAG JetMag Pro magnetic filters to lenses with a 49mm thread size, and is made from durable aluminum. This lets you use your 67MAG filters on smaller 49mm lenses without needing a separate filter set, and the aluminum build ensures a secure, long-lasting fit.
NiSi JetMag Pro 67MAG Magnetic Filter Adapter Ring (49mm)
