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Black metal step-down adapter ring 72mm to 55mm

ProOPTIC

ProOPTIC Step-Down Adapter Ring 72mm to 55mm

SKU CH-HZ2M-A6PH2

Enables 55 mm filters on 72 mm lenses for versatile macro and ring-flash photography

  • Use 55 mm filters on 72 mm threads via step-down ring
  • Durable metal construction withstands repeated mounting and daily use
  • Enables reverse-lens macro and ring-flash setups with secure fit
  • Cost-effective way to expand filter options without new lenses
  • Simple screw-on design attaches in seconds for reliable connection

What this adapter does

This ProOPTIC step-down ring lets a 72mm lens accept 55mm threaded filters. It screws directly into the front of the larger lens and presents a smaller thread for the filter. The metal construction is built for repeated mounting and removal.

Thread sizes that matter

The ring converts a 72mm male thread on the lens to a 55mm female thread for the filter. Both diameters must match your gear exactly; a mismatch on either side will prevent a secure fit. No other thread sizes are supported by this model.

Where it works and where it stops

The adapter enables use of existing 55mm polarisers, ND filters or protection glass on 72mm lenses, saving the cost of larger filters. Vignetting can appear at wide focal lengths or when stacking multiple filters, which limits its usefulness for ultra-wide compositions.

Highlights

  • Use 55 mm filters on 72 mm threads via step-down ring
  • Durable metal construction withstands repeated mounting and daily use
  • Enables reverse-lens macro and ring-flash setups with secure fit
  • Cost-effective way to expand filter options without new lenses
  • Simple screw-on design attaches in seconds for reliable connection

Specifications

No published specifications for this item yet.

Questions about this item

How does the 72mm-to-55mm step-down change what I can put on the lens?

It lets you screw 55mm filters onto a lens that has a 72mm front thread, so you can use smaller, often cheaper filters without buying new glass.

What thread standard does the SDR7255 use and what does it limit?

Both sides use standard camera filter threads; the ring simply reduces the diameter from 72mm to 55mm, so only 55mm accessories will fit the front.

What physical clearance do I need to mount this adapter on my lens?

The ring screws directly into the 72mm front thread of the lens and adds only a thin metal frame, so it fits wherever a regular 72mm filter would.

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