37mm to 49mm Step Up Ring Filter Adapter for Canon NEX, m4/3 and Nikon UV/ND/CPL

What it is

This 37mm to 49mm step up ring is a simple aluminium adapter that lets you use 49mm filters on lenses with a 37mm front thread. It’s a lightweight, no-nonsense accessory designed for photographers who want to maximise filter options without buying new glass. It lives on the front of the lens, keeping the original filter thread and access to other front-mounted accessories intact.

How it works

The ring converts your 37mm lens thread to 49mm, so you can thread 49mm filters, hoods or other front-facing accessories onto a narrow-diameter lens. Made from aluminium, it aims to be durable while keeping the setup compact. It’s a straightforward, affordable way to expand your existing kit’s flexibility rather than swapping lenses or filters.

Practical use and scenarios

If you frequently shoot with wide-angle or compact systems that commonly use small front filters, this adapter can help you standardise on a single filter size. For instance, if you already own 49mm filters, the 37→49mm ring prevents you from needing a whole set of filters in multiple sizes. It’s particularly useful when you’re travelling light or layering ND or CPL effects across several lenses with a 37mm thread.

What to know before buying

• Compatibility: the ring is designed for lenses with a 37mm front thread and accepts 49mm filters or accessories threaded to 49mm. It does not alter optical performance or introduce new glass, the purpose is to adapt the size.
• Material and build: described as aluminium, which suggests corrosion resistance and lightness for regular shooting, though it’s still a mechanical accessory and should be treated with normal care.
• Mounting and fit: as with any step-up ring, precise threading is essential. If your lens’s 37mm thread is damaged or stiff, you may experience cross-threading or poor alignment.
• Weight and balance: adding any ring changes how a lens balances on a camera body, which can affect hand-held use, especially with compact mirrorless bodies. Consider this if you frequently shoot extended periods hand-held.
• Limitations: the product does not replace filters, it only allows you to use 49mm filters on a 37mm-threaded lens. If you plan to shoot with multiple filters or require multiple sizes, you’ll need additional adapters.

Tech specs

• Name: 37mm to 49mm Step Up Ring Adapter
• Material: Aluminium
• Front thread size (lens side): 37mm
• Filter side size: 49mm
• Model intent: transform caliber to share the same filter diameter across compatible accessories
• Compatibility note: designed to mount on the front of lenses with 37mm threads, use with 49mm filters and related front-mounted accessories

Use cases and expectations

If you prioritise keeping a compact kit and you already own a set of 49mm filters, this adapter can keep your options open without investing in a whole new filter collection. It isn’t a performance upgrade, it’s a convenience tool to help you avoid buying duplicates. If you regularly switch between lenses with 37mm and 49mm threads, this can simplify what you carry. However, if you rarely use filters, or you need precise optical performances with higher-end filters, there may be more cost-effective or more robust options depending on your workflow.

Pros and cons

• Pros: straightforward, light, inexpensive way to use 49mm filters on a 37mm lens, preserves existing filter and hood configurations, compact on-camera footprint.
• Cons: adds one more mechanical piece to your setup, potential balance shift, and you still need 49mm filters for true 49mm compatibility. Not a substitute for a dedicated multiple-filter system or high-end, optically engineered adapters.

FAQ

• Can I use any 49mm filter with this adapter? Yes, as long as the filter is 49mm and threads on correctly to the adapter’s 49mm side.
• Will this affect image quality? The ring itself is an in-line accessory, it does not modify optics. Any impact would come from added weight or potential vignetting only in extreme configurations.
• Is it worth it if I only have one 37mm lens? It depends on your need to reuse 49mm filters across lenses, if you rarely switch filters or don’t own 49mm filters, it may be less valuable.

Final verdict

Is it worth it? Worth considering if you already own 49mm filters and want to use them with a 37mm lens without buying new filters. It’s a practical, budget-friendly addition for expanding your filter options, especially for travel or on-the-go shooting. If you’re chasing optical perfection or if your lenses demand rigorous balance for long shoots, assess whether an alternative setup better fits your kit and shooting style.