NiSi JetMag Pro Prolock Luminous Magnetic Adaptor Ring

• Upgraded ProLock Locking Design – An enlarged locking area delivers a stronger, more secure hold than a standard adapter ring, helping prevent accidental loosening during handling or filter rotation.
• Luminous Lock Markings – Specially formulated glow-in-the-dark markings absorb light and keep glowing in darkness, making the lock position easy to identify without reaching for a torch.
• Built for Low-Light Shooting – Ideal for astrophotography, star trails, and night landscapes, where fitting and locking an adapter ring by feel would otherwise slow you down.
• Secure Hold for Rotating Filters – The wider locking range keeps filters firmly attached even after slight rotation, such as when adjusting a circular polariser or dialling in a variable ND.
• Knurled Grip Texture – Precision-milled knurling improves grip for fast, confident attachment and removal, even with cold fingers or gloves on in the field.
• JetMag Pro Magnetic Speed – Once the ring is mounted on your lens, compatible JetMag Pro filters snap on and off magnetically in seconds, with no re-threading required.
• Lightweight Aluminium Construction – Full aluminium construction delivers a lightweight yet durable body that resists corrosion and withstands harsh outdoor environments in any weather or terrain.

Designed for Low-Light and Night Photography

The Prolock Luminous Adapter Ring was created for the moments when standard gear slows you down: astrophotography sessions, star trail shoots, and pre-dawn landscape starts. When you are working by headlamp or by feel, its luminous markings and enlarged locking area take the guesswork out of mounting and securing your filters.

Luminous Lock Markings for Instant Orientation

Specially formulated glow-in-the-dark markings absorb ambient or torch light and continue to glow in darkness. A quick glance shows exactly where the lock position sits, so you can align, fit, and secure the ring without interrupting your workflow or ruining your night vision with a bright light.

Enlarged ProLock Locking Area

The upgraded ProLock design features a significantly wider locking section than a standard adapter ring. This provides a more secure hold and helps prevent accidental loosening from unintended contact during normal handling, letting you stay focused on capturing the moment rather than repeatedly checking that your gear is still tight.

A Secure Hold for Rotating Filters

The wider locking range keeps filters secure even after slight rotation, such as when fine-tuning a circular polariser or adjusting a variable ND. Rotational adjustments transfer less force to the ring itself, so the adapter stays locked to the lens while you dial in the filter above it.

Knurled Grip for Fast, Confident Handling

A precision-milled knurled surface wraps the outside of the ring, ensuring a firm grip and no slip during critical adjustments. Attachment and removal stay quick and positive even with gloves, cold fingers, or wet hands, which matters when you are setting up in the dark or racing changing light.

JetMag Pro Magnetic System for Fast, Secure Workflow

Once the Prolock ring is threaded onto your lens, the JetMag Pro magnetic system takes over. Compatible MAG filters snap into place in seconds and hold securely while you shoot, so you can swap between an ND, CPL, or night filter in the field without re-threading anything.

Fully Integrated with the JetMag Pro Filter System and Caps

The ring works with the complete JetMag Pro line-up, including ND, CPL, VND, Natural Night, Star Soft, and other compatible MAG filters, along with magnetic front caps. It adapts to different shooting scenarios while maintaining image quality and full operational flexibility across your setup.

Lightweight Aluminium Construction

Full aluminium construction delivers a lightweight yet durable body that resists corrosion and withstands harsh environments, from coastal spray to alpine cold. 

Whether you are shooting the Milky Way from a remote dark-sky location, capturing star trails through the night, or simply working through a fast-changing sunset, the NiSi JetMag Pro Prolock Luminous Magnetic Adaptor Ring delivers a more secure, more visible, and more confident connection between your lens and your JetMag Pro filters. It is a small upgrade that removes friction from every low-light shoot.

Also available in 58mm, 67mm, 72mm, 77mm, and 82mm thread sizes.