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Bright Tangerine clamp-on ring, matte black metal cylinder with knurled edges, step-down 162 to 136mm

Bright Tangerine

Bright Tangerine 162-136mm Clamp-on Ring #B1250.1047

SKU CH-KRBH-ETFGT

A clamp-on ring that steps a 162 mm threaded lens down to 136 mm for Blacklight matte boxes

  • Converts 162mm lens threads to 136mm front diameter
  • Expands lens compatibility for Blacklight matte box systems
  • Durable Bright Tangerine construction ensures reliable field performance
  • Clamp-on design enables quick attachment without tools
  • Essential step-down adapter for precision matte box workflows

162–136 mm clamp-on ring for Blacklight matte boxes

The Bright Tangerine B1250.1047 is a step-down ring that lets a 162 mm threaded matte box accept lenses with a 136 mm front diameter. It is built for camera operators and cinematographers who need to adapt existing Blacklight matte boxes to a wider range of lenses.

Step-down conversion expands lens compatibility

The ring converts the matte box opening from 162 mm down to 136 mm, allowing smaller-front lenses to mount securely without vignetting. This single accessory replaces the need for multiple matte boxes when switching between lens sets on set.

Handles 136 mm front lenses on 162 mm threaded boxes

The clamp-on design holds firmly on standard Blacklight 162 mm threads while supporting any lens with a 136 mm front. It will not fit matte boxes with different thread sizes or lenses larger than 136 mm.

How it compares

Measured against everything we stock in Camcorder & C-Mount Lenses, at today’s prices. Recalculated every night.

Price $72.99
Cheaper than about 76% of the 328 comparable items (median $313.99).

Specifications

No published specifications for this item yet.

Questions about this item

Will the 162mm threaded hole or the 136mm front diameter wear out first with repeated mounting?

Both surfaces are machined metal; the 162mm threads engage the matte box while the 136mm bore accepts the lens, so neither wears faster under normal clamp-on use.

What stops me from clamping a heavier lens onto the 136mm step-down bore?

The ring itself is a passive adapter with no locking mechanism beyond the matte-box clamp, so the matte box’s own clamp torque and rod support determine the practical weight limit.

Does the aluminium ring get hot enough to affect focus when the matte box sits under studio lights all day?

The ring is a thin metal spacer without electronics or moving parts; it reaches ambient temperature quickly and does not generate heat, so focus shift from thermal expansion is negligible.

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