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Black anodized aluminium step-up ring, 30mm to 37mm threads

Ultimaxx

Ultimaxx 30-37mm Step-Up Ring camera filter

SKU CH-S3ZJ-VBGJX

Enables 37mm filters on 30mm lenses with corrosion-resistant anodised aluminium construction

  • Typefilters
  • Use 37mm filters on 30mm lenses with this step-up ring
  • Corrosion-resistant black anodized aluminum finish protects against wear
  • Lightweight alloy construction adds minimal bulk to your kit
  • Precision threading ensures secure filter attachment without vignetting
  • Expands filter compatibility for 30mm thread lenses

30-37mm Step-Up Ring for Lens Adaptation

The Ultimaxx step-up ring lets photographers attach 37mm threaded filters to lenses with a 30mm front thread. It is built from lightweight aluminium alloy with a black anodised finish that resists corrosion. This accessory is intended for shooters who own smaller-thread lenses but want to use larger filter sizes without buying duplicate glass.

Mechanical Limits of 30mm to 37mm Threads

The ring bridges a 7mm thread diameter difference using male 30mm and female 37mm threads machined into a single alloy piece. It adds minimal thickness to the optical path, though any adapter introduces a slight risk of vignetting on ultra-wide focal lengths. The anodised surfaces reduce reflection and resist seizing, but the ring cannot reduce filter size or adapt non-threaded mount systems.

Filter Compatibility and Vignetting Headroom

The ring comfortably handles standard 37mm circular polarisers, UV protectors and neutral-density filters on 30mm kit or prime lenses. It runs out of headroom when stacked with thick frames or multiple filters, which increases vignetting probability on wide-angle optics. It does not support square filter holders, drop-in systems or lenses lacking a 30mm front thread.

Highlights

  • Use 37mm filters on 30mm lenses with this step-up ring
  • Corrosion-resistant black anodized aluminum finish protects against wear
  • Lightweight alloy construction adds minimal bulk to your kit
  • Precision threading ensures secure filter attachment without vignetting
  • Expands filter compatibility for 30mm thread lenses

Specifications

Typefilters

Questions about this item

Do I need the 30-37mm ring or a different size for my lens?

Choose this ring when your lens has a 30mm filter thread and you want to attach a 37mm filter.

Will vignetting appear when I stack a 37mm filter on my 30mm lens using this ring?

The thin aluminium profile keeps the filter close to the front element, so vignetting is unlikely on most wide-angle lenses.

Is the aluminium thread standardised so any 37mm filter will screw on securely?

Yes, both the 30mm male and 37mm female threads follow the common camera-filter pitch, so any 37mm filter mounts firmly.

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