The Heliopan 37.5-39mm Step-Up Ring (#291) is a step-up ring permitting the use of 39mm threaded filters on a 37.5mm threaded lens. Constructed of matte black brass, Heliopan step-up rings are highly durable and longer-lasting when compared to aluminum rings.

Use 39mm Filters on 37.5mm Lens    Brass Ring for Durability    Matte Black Finish Reduces Glare

Efficient solution for use of one size of filters with various sized lenses.

Matte black brass lessens chance of glare.

Rugged construction for ease of use.

Related Questions and Answers

Q: 1. Hello, I have a 67mm Haida brand filter. Can I use this ring on my other 39mm diameter lens? Thanks.

A: This Benro Step-Up Ring will allow you to mount a 67mm filter on a lens with a 39mm filter thread.

Q: 2. what is the thread pitch?

A: Heliopan does not list the pitch on the Heliopan 42-39mm Step-Down Ring (#316). But standard for that size is 0.75mm thread pitch.

Q: 3. Does using a 62 mm lense instead of a 52 mm lense make a difference in photo quality?

A: In general, no. However, it can be used to prevent vignetting on a wide angle lens with a standard ring polarizer or when stacking more than one filter on a lens.

Q: 4. I'll be using this on my 85mm Tessar ZM which has 43mm filter thread. All of my filters (CPL and ND) have 39mm filter thread. Will my 85mm Lens vignette by using this item?

A: Anytime you use a step-down ring to use a smaller filter on the front of a lens with a larger filter diameter, you run the risk of obtaining some vignetting. Unfortunately, we have no way to test or guarantee which lens/focal length combinations. While vignetting would normally be more noticeable with wide angle lenses compared to telephoto lenses, I cannot guarantee you will not get vignetting. The best I can state would be to purchase the item and see if it works for your needs, and if it does not, you would have 30 days to return the item for an exchange or refund via our 30-Day Return Policy on this item.

Q: 5. I have never used step rings before and am just wondering can they be stacked to use 62mm filter on 52mm lens? Or is there an other option I should consider. Does stepping up like that increase the chance of lens damage considering the filter extends wider than the barrel?Thanks

A: Yes, they work just fine. I would echo the caution on internal reflections.

Q: 6. Is this m52 x 0.75 male thread? Also, what is the external diameter of this step down ring? Thanks

A: Yes, the 52mm end is male. I'm sorry but the external diameter is not available, you can contact Heliopan for more specific info; HeliopanDistributed By - H.P. Marketing CorporationTel: 800-735-4373 Website http://www.hpmarketingcorp.com/ Email info@hpmarketingcorp.com

Q: 7. do you have a brass set like this?

A: There are many individual step-up rings made of brass, but there are no sets of brass step-up rings like the Nisha Step-Up Ring Set (Set of 8).

Q: 8. Will this ring fit Tiffen 55mm Circular Polarizing Filter

A: Yes it will.

Q: 9. What is the overall diameter of this step-down adapter ring?

A: There are no published measurements of the diameter of the Heliopan Bay 1-30.5 Step-Down Ring (#305).

Q: 10. Any observed drawbacks when used on a Sony G-Master 85mm (77mm) with a 72mm Zeiss Polarizer ?

A: There will always be issues using a smaller size filter than the filter threads of the lens. Most notably you are likely to get vignetting.