[Brass] I wanted a step down ring to use with a Nikon 24-70mm lens (82mm) to allow the use of my existing 77mm Lee Filter adaptor. After reading many reviews of the rings available, I decided it would be best to spend more to get a stronger brass ring rather than the less expensive aluminum rings. I have an assortment of smaller aluminum rings and these to tend to stick sometimes and can be hard to remove and the aluminum threads are easily damaged and cross threading can be a problem, if one is not very careful with these. I have not actually had an occasion to use the brass ring, yet; but I have put it onto the 24-70 lens to see how it feels. It is easy to thread onto and off of the lens and feels very solid.

[59 mm to 55 mm] I recently purchased a Zeiss 1:1.4/50 for my EOS 7D and thought that my Raynox DCR-1850Pro Teleconverter Lens 1.85x which I used with my Dimage camera, might be adapted to this lens. I installed this step-down ring between the two and now enjoy a 100mm+/- lens along with my great Zeiss 50mm. I store the two attached and separate as needed. The high quality of this ring makes this possible; shows little wear after much use. I am thouroughly satisfied with this ring and highly reccomend it. ( Watch for the green light,Luke, a manual focus lens, it is!)

[Brass] Fits right and doesn't stick, It's the quality product I expected.
I use it to attach a Nikon No. 5T or No. 6T to a Nikon 70-200 f4 G IF-ED VR.

[Brass] ... This step-down ring was a special order because of it's uncommon size and I had to wait a little while for it to come from the manufacturer but it was well worth the wait! It's built exceptionally well, it performs as it should and now I am able to mate my vintage spiratone curvatar to my 58mm canon eos lenses for an inexpensive but fun fisheye effect. It really is a simple item but if you need one it's good to know you can obtain one!

[Brass] OIL the ring so you can get it off ..!

[Brass] This is my first experience using a Heliopan product. All of my lens filters are B+W but they didn't make a step-down ring in the size I needed. I could have purchased a much less expensive ring but the Heliopan was the only one I saw with the same quality of the B+W. It is made of brass and very well constructed. I would recommend it to others.

[Brass] If your concerned about anti-binding or absolute strength (like using it to attach lens modifiers, not just light filters), this is the best of the best. The premium aluminum rings are great too, this just goes the extra mile, but the cost premium can hurt a bit.

[59 mm to 55 mm] Great quality! It feels solid in your hand and you can feel the quality with its weight.

[0.05 lb] rolls royce of rings

[Brass] Great fit, no snagging, great heliopan quality brass ring. Should last a long time.