This Cavision 28-37mm Step-Up Ringenables the use of 37mm threaded filters on lenses with 28mm filter threads. The 6mm depth enables this ring to fill the gap between the lens and the back of select rod-mounted matte boxes, helping to keep reflections from hitting your lens. The step-up ring has a 40mm outside diameter for use with clip-on matte boxes. It features a lightweight aluminum alloy construction with a black anodized finish.

Use Alone or with Select Matte Boxes    Adapts Lens with 28mm Filter Thread    For 37mm Filters    6mm Depth    40mm Outside Diameter    Anodized Aluminum Construction

Use alone or with select matte boxes

This adapter ring features a depth of 6mm, suiting it for reflection prevention use with rod-mounted matte boxes

Lightweight, durable anodized aluminum construction

Related Questions and Answers

Q: 1. Where is it made?

A: This item is country of origin China.

Q: 2. I noticed that the individually sold 67-77mm Sensei step-up ring is sold as (and is marked) "Sensei Pro". But, the rings in this kit are not marked with the "Pro" designation. What is the difference being as the single 67-77 "pro" ring costs 50% of what this kit costs??? Thanks!

A: The pro rings are matte black and have knurled edges.

Q: 3. Can I use this StepUp on a Fujifilm X30?

A: No; 40.5 is too large to go on the X30. It is frustrating to try to attach anything to these little Fuji lenses. I ended up buying a lot of miscellaneous caps, hoods, step up rings, and filters. I finally gave up and purchased the Fuji hood that came with a clear filter (size not specified but perhaps a 40mm) and a pinch cap. It seemed like an unreasonable price, but it works well. All the other filters and step up rings and caps are part of my estate.

Q: 4. Is this compatible with the fuji 23mm f/2 wr lens?

A: No it is not. the FUji 23mm F/2 WR lens has a 43mm filter thread you will need a step up ring that matches that (such as a 43-49mm)

Q: 5. Are the threads female on both sides?

A: No. The 58mm side is male and screws into the lens. The 49mm side is female and receives the filter's male threads.

Q: 6. My email was wrong. Is this a 52mm female thread? to a 48mm male thread?

A: The Sensei 52-48mm Step-Down Ring has female 48mm threads on the front of the ring to allow you to connect a filter with 48mm male threads to the step-down ring. The back of the step-down ring has 52mm male filter threads which will screw into the 52mm female filter threads on the front of your lens.

Q: 7. 49 mm is a common thread size for Sony and mft lenses, so I think the small 37mm is also a mft and small bayonet lenses, so, I think it's good to step for this kind of lenses

A: Is this a question or a statement?

Q: 8. What is the height protrusion of the ring above the lens?

A: Sensei 72-67mm Step-Down Ring IS 4mm tall above the threads.

Q: 9. Does this filter allows to use a 67mm filter on 52mm lenses?

A: This will actually do the opposite- this allows you to use a 52mm filter on a 67mm lens. Instead, you will want the 52-67mm step up ring: http://bhpho.to/1clCmra

Q: 10. Any vignetting? I would be using 37mm macro filters on 46mm lenses. Thanks!

A: Regarding the Sensei PRO 46-37mm Aluminum Step-Down Ring, yes, using 37mm on a lens with a 46mm diameter may cause vignetting.