The Heliopan 37.5-39mm Step-Up Ring - #291is 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. I have a Nikon Z50 and wish to go from a Nikkor DX 16-50 3.5-6.3 to a Nikkor DX 50-250/4.5-6.3 would the Heliopan 700177 be compatable with the threads on the lens. In the future I'll be purchasing a better set of filters what is the thread type on this step up adapter?

A: You can use the Heliopan 46-62mm Step-Up Ring (#177) on the Nikon NIKKOR Z DX 16-50mm f/3.5-6.3 VR Lens (Black). With that you will than be able to use the same filters as the ones on the Nikon NIKKOR Z DX 50-250mm f/4.5-6.3 VR Lens.

Q: 2. What is the thickness of this filter in mm, especially the outside 82mm diameter portion?

A: The thickness of this step up ring is about 4mm.

Q: 3. Greetings! Is this the .5 fine thread or the standard .75 thread? I wish to use on a Polaroid 180 and don't want to trash the threads.Thanks!

A: The Heliopan 46-49mm Step-Up Ring uses standard threads, and are excellent quality step-up rings with brass construction.

Q: 4. Can it work with NiSi S6 150mm Filter Holder Adapter Ring for Standard Filter Threads 105, 95, and 82mm ?

A: This ring will allow for an adapter with a 105mm thread to fit a lens with a 95mm thread.

Q: 5. Would this ring permit the use of 55mm threaded filters on a lens with a Series VII filter-thread? The Leica R 90mm f2 (old version, not the later version) is the lens I have in mind.

A: No, that adapter is for lenses that have a 54mm thread. Series 7 is not 54. If you have a retaining ring, most of those are 54 mm it might work. But the adapter alone will not work. This is a retaining ring, General Brand Series 7 Retaining Ring BH #GBRRS7 https://bhpho.to/3bJHVPU

Q: 6. Is this coarse or regular thread?

A: This ring has standard threads.

Q: 7. Hi what is the outer diameter of this Step-up Ring?Actually I am looking for a Push-on lens cap...Any brand that you recommend, which fits?Thank you

A: Rather than a push-on cap, you will be better off using a Hood Hat type of covering, such as those seen at the following link: http://bhpho.to/1w9ZAZT

Q: 8. Can this cause vignetting on a Laowa 7.5mm lens?

A: The Heliopan 46-58mm Step-Up Ring will not cause vignetting if attached to the Laowa 7.5 lens, but the "lens hood" must be removed to allow for the connection of the 46-58 step up ring.

Q: 9. 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: 10. What is the thread pitch of the 43mm threads?

A: The thread pitch is not listed for this adapter. However it will allow you to use 52mm Filters on a 43mm Lens.