B+W

B+W Step-Down Ring 72mm to 58mm Lens Filter Adapter

Name: B+W Step-Down Ring 72mm to 58mm Lens Filter Adapter
Brand: B+W

★★★★★4.2 (174 reviews)

The B+W 72mm-to-58mm step-down ring lets you mount larger 72mm filters onto lenses with a 58mm front thread, built from precision-machined aluminum.

$49.00*

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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The B+W Step-Down Ring 72mm to 58mm is a straightforward adapter for photographers who want to use their 72mm filters on lenses with a 58mm front thread. Rather than purchasing duplicate filters in multiple sizes, a step-down ring lets you standardize on one larger filter size and adapt it to fit smaller lenses. This particular ring is manufactured from high-quality aluminum, ensuring clean threads and a snug, wobble-free connection between lens and filter.

The ring features engraved size markings on its outer edge, making it easy to identify at a glance — a practical detail when you have multiple adapter rings in your bag. With a standard 0.75mm thread pitch on both sides, it is compatible with the vast majority of 72mm filters and 58mm lens threads on the market. It adds minimal bulk and, because the filter diameter is larger than the lens thread, vignetting is generally not a concern.

Key Features

Manufactured from high quality aluminum

Engraved on side for easy identification while on your lens

0.75 standard thread pitch for all filters in this size

Specifications

Brand

B+W

Model

65-069438

Material

Aluminum

Filter Thread Size

72mm (filter side)

Lens Thread Size

58mm (lens side)

Thread Pitch

0.75mm (standard)

Identification

Engraved on side

Water Resistance

Not water resistant

Dimensions

2.83" L x 2.83" W

Pros & Cons

👍 Pros

Machined from high-quality aluminum for a precise, secure thread fit
Engraved size markings on the side make identification easy when mounted
Standard 0.75mm thread pitch ensures broad compatibility with filters and lenses
Larger filter diameter relative to lens thread minimizes vignetting risk

👎 Cons

The step-down design means the 72mm filter will protrude noticeably from a 58mm lens
Lens caps designed for 58mm threads will not fit over the mounted ring and filter
Not water resistant, so care is needed in wet conditions to prevent corrosion over time

Frequently Asked Questions

What does a step-down ring do compared to a step-up ring?

A step-down ring adapts a larger filter to fit a smaller lens thread. This 72mm-to-58mm ring lets you attach 72mm filters to a lens with a 58mm front thread. A step-up ring does the opposite — it lets a smaller filter fit a larger lens.

Will using this step-down ring cause vignetting?

Because the 72mm filter is larger than the 58mm lens thread, vignetting is unlikely. Step-down rings generally avoid vignetting issues since the filter diameter exceeds the lens opening.

Is the thread pitch compatible with all 72mm and 58mm filters and lenses?

Yes. The ring uses the standard 0.75mm thread pitch, which is the industry standard for both 72mm and 58mm filter threads.

Can I stack this ring with other filters?

You can, but stacking multiple rings and filters increases the profile in front of the lens, which may cause vignetting at wider focal lengths.