This Small Compression Ring Set from Novagrade includes four compression rings and permits any Novagrade digiscoping adapter to be used with 23mm to 40mm-diameter eyepieces. Such eyepieces may be found on microscopes, small telescopes, and binoculars.

Installation is easy: simply remove the adapter's retaining ring, swap out the original compression ring with the right one from this set, and replace the retaining ring. The compression rings each feature an expandable design, constructed from an injection-molded plastic polymer and made in the USA.

For All Novagrade Digiscoping Adapters    4 Flexible Compression Rings    Use Adapters on Small-Diameter Eyepieces    Fits Eyepieces 23-40mm    Injection-Molded Polymer Construction    Made in the USA

The compression rings fit the following diameter ranges:

• 23-28mm

• 27-32mm

• 21-36mm

• 35-40mm

Related Questions and Answers

Q: 1. Will these work for the Sennheiser MZS 80 Shock Mounts

A: The Sennheiser O-Ring Set for MZS40 and EA2124A Shockmounts (B&H # SE576577) is compatible with the Sennheiser Shock Mount MZS80 (BH # SEMZS80).

Q: 2. What material are they made of? Can be used underwater?

A: These are a plastic nylon material so you should be able to use these under water no problem.

Q: 3. Interested in this product but can you recommend a suitable t ring for Olympus EM1X ? Shall order both together. Thanks.

A: There are a few options available for the Micro Four Thirds Mount. One option is the Vello linked here. https://bhpho.to/2QjswkB

Q: 4. Is it compatible with this E mount adapter? https://www.bhphotovideo.com/c/product/839140-REG/vello_la_nex_t_lens_mount_adapter.

A: The Novagrade T-Mount Digiscoping Adapter is compatible with the Vello T-Mount Lens to Sony E-Mount Camera Lens Adapter.

Q: 5. Are the cards rigid or floppy? Do they bend when held up by the subject, or do they remain flat/taught?

A: The cards are rigid.

Q: 6. what are they made of?

A: All plastic construction, not cardboard.

Q: 7. size?

A: Small is 3.25 x 2 , Medium is 5.1 x 3.9 , Large is 10 x 7.9 . Ref mfg website

Q: 8. How long is the lanyard? Can it be easily worn around the neck, falling to a little above the waist?

A: it is 13" and you can use anyway

Q: 9. this product seems to need a ring of the correct size to fit the filter thread of the camera lens lens. No choice of a ring size seems to be offered. Do you sell those separately or what is the situation?

A: When using the Novagrade T-Mount Digiscoping Adapter, one needs to have a specific camera dedicated T ring. The T (telescope) ring, is available for all camera mounts for example: for Nikon: https://bhpho.to/2foCBsv, for Canon: https://bhpho.to/2bczbHc

Q: 10. What sized T-ring does it connect to? I assume a t-ring is like a filter ring but each lens may need a different diameter ring. My favorite fixed focal length lens has a 49mm Daly light filter on it.

A: This adapts to your camera with a specific T ring not the lens. If for example, you have a canon EF mount camera, you will need a T ring to allow connection to that camera. Then you can attach the Novagrade to the camera. Once that's done, the camera with Novagrade will fit on to the eyepiece of a spotting scope for Digiscoping Photography.