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Adapters with specific outer diameter

Adapters with a specified outside diameter for matte boxes, eyepiece ports and other slip-in connections.

Browse by outside diameter

Choose the outside diameter of the adapter that your equipment accepts. Check insertion length and the method of securing it before ordering.

Use the Front Side and Rear Side filters in the product listing to narrow down both connections.

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Items 1-12 of 119

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Connection reference and compatibility

Browse the reference — 13 entries

1.25" outer diameter

External cylindrical seating diameter: 1.25 inch. Used by small astronomy eyepieces.

Astronomy

Outer Diameter: selection guide

Matte box connections

Match the adapter outside diameter to the receiving matte box connection. Check clearance, engagement length and the connection on the lens side.

Slip-in connections

For telescope and microscope ports, match the receiving bore and confirm the required insertion depth. The 1.25-inch and 2-inch categories use nominal eyepiece barrel sizes.

Browse all adapter types · Request a custom adapter

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Shopping Options
Adapter Front Side
  1. 1.25" telescope port 3items
  2. 2″ telescope port 9items
  3. 3" telescope port 2items
  4. 23mm 1 item
  5. 41.5mm clamp 1 item
  6. 75mm 1 item
  7. 80mm clamp 1 item
  8. 80mm diameter 3items
  9. 95mm diameter 3items
  10. 114mm diameter 13items
  11. 115mm diameter 1 item
  12. 134mm diameter 5items
  13. 143mm diameter 6items
  14. 165mm diameter 1 item
  15. M42x1 4items
  16. M72x0.75 1 item
  17. M77x0.75 32items
  18. M86x0.75 5items
  19. M86x1 21items
  20. M95x0.75 3items
  21. M95x1 2items
  22. SCT 2″ thread 1 item
Adapter Rear Side
  1. 1.25″ eyepiece holder 2items
  2. 2″ eyepiece holder 2items
  3. 38mm outer diameter 1 item
  4. 51mm clamp 1 item
  5. 57mm clamp 1 item
  6. 58mm clamp 1 item
  7. 62mm clamp 1 item
  8. 62.5mm clamp 2items
  9. 65mm clamp 1 item
  10. 67mm clamp 1 item
  11. 70mm clamp 3items
  12. 73mm clamp 2items
  13. 75mm clamp 1 item
  14. 76mm clamp 1 item
  15. 83.5mm clamp 1 item
  16. 86.5mm clamp 1 item
  17. 89mm clamp 1 item
  18. 91mm clamp 1 item
  19. 99mm clamp 3items
  20. 107mm clamp 1 item
  21. 115mm clamp 1 item
  22. 121mm clamp 1 item
  23. 132mm clamp 1 item
  24. 134.4mm clamp 1 item
  25. 100mm dovetail 1 item
  26. C-mount 1 item
  27. Clamp for LOMO SFA 35mm 4items
  28. Clamp for LOMO SFA 50/75/80mm 1 item
  29. M26x0.75 1 item
  30. M28.5x0.6 2items
  31. M29x0.5 1 item
  32. M35x0.5 1 item
  33. M35.5x0.5 1 item
  34. M36.4x1 1 item
  35. M40x0.75 1 item
  36. M42x0.75 (T2) 1 item
  37. M45x0.75 1 item
  38. M47x0.75 1 item
  39. M47.5x0.75 1 item
  40. M48x0.75 1 item
  41. M49x0.75 1 item
  42. M50.8x0.5 1 item
  43. M52x0.75 2items
  44. M55x0.75 1 item
  45. M56x0.5 1 item
  46. M60x0.75 2items
  47. M62x0.75 2items
  48. M65x0.75 1 item
  49. M66x0.75 1 item
  50. M67x0.75 3items
  51. M72x0.75 2items
  52. M76x0.75 1 item
  53. M77x0.75 7items
  54. M82x0.75 9items
  55. M85x0.75 3items
  56. M85x1 3items
  57. M86x0.75 5items
  58. M92x0.75 1 item
  59. M95x0.75 4items
  60. M95x1 2items
  61. M96x0.75 1 item
  62. M105x0.75 1 item
  63. M105x1 1 item
  64. M108.5x0.75 1 item
  65. M115x0.75 3items
  66. Mamiya 645 1 item
  67. Nikon F 2items
  68. Pentax 67 2items
  69. Sony E-mount 1 item
  70. Other front clamp 2items
Source
  1. Belarus 119items
  2. USA 10items
  3. Austria 5items