The #440 Step-Down Ring from Heliopan permits the use of 54mm filters on a 55mm threaded lens. It features a durable brass construction to prevent jamming and binding, and it has a matte black finish to reduce reflections.

Use 54mm Filters on 55mm Lens    Brass Construction    Matte Black Finish

Related Questions and Answers

Q: 1. Any idea as to whether this SDR will fit an Opteka 0.3x fisheye 52mm onto a Canon GL2 with 58mm threads?

A: Yes,it will fit.

Q: 2. Are there any side effects (vignetting, i think is the term used) when using the smaller 77mm filters on the larger 82mm lens?

A: Hi again Steve, just received your reply. I did not consider going to a full frame camera. Throwing that into the mix especially with a 24-70 lens I think pretty much would cause vignetting. Going from an 82mm down to a 77mm equals about one-quarter inch that would equal a one-eighth inch reduction on each side of the filter's rim. I would expect you'll get a lot of vignetting. One consideration is that the Sensei 82-77 step-down ring is not really expensive and if it caused too much vignetting you're not out a lot of money for the ring itself. I buy that brand, as they work very well and at a low cost. I would say to start saving for 82mm filters; I think you'll fine more vignetting than you'll want to deal with, especially going to a full frame camera and that lens.

Q: 3. 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: 4. could i use this in nikon lens to step down to use with 37mm Firecrest Neutral Density 5.4 Solar Eclipse Filter (18-Stops)?

A: You should be able to, but I am bot sure!

Q: 5. I have a 58mm polarizer filter and now am purchasing a 62mm lens. Can I us a step-up adapter ring to make this work? If so which one do I want?Thank you.

A: As the 58mm filter you own is smaller than the 62mm filter threads on the lens you wish to purchase, you would need to purchase a 62-58mm step-down ring, such as the Sensei 62-58mm Step-Down Ring, B&H # SESDR6258. Do note that when using a filter with a smaller filter thread on a lens that has a larger filter thread, you may encounter some vignetting due to the smaller filter thread size. (not guaranteed, but it is a possibility of which you should be made aware).

Q: 6. 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: 7. Might be a dumb question but can this be used with a 77mm filter on a 62mm lense? from the description it seems like its meant more for the other way around

A: This ring is to attach a 62mm filter to a 77mm lens thread but for wide lenses, that's a no-no, vignetting will occur.

Q: 8. Can multiple step down rings be used at same time to achieve desired use. For example, assuming one ring in size needed does not exist, can I use a 77mm to 72mm + a 72mm to 68mm at same time?Tks.

A: You could use multiple step-down rings together if the combination you need isnt available. I would suggest using more than two together. Also keep in mind that using a filter that is smaller than the filter thread of a lens can cause vignetting. So you wouldnt want to use a filter that is too much smaller than your lens.

Q: 9. How much does this product weight?

A: According to our shipping specifications, the product will weigh .30 lb.

Q: 10. 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.