Telescope Eyepiece Adapter

I recently bought a new telescope which used 1.25 inch eyepieces. However, I had four 0.965 inch eyepieces from my old telescope, which I was unable to use. Until I created this adapter! This instructable will show you how to create an adapter for 0.965 inch telescope eyepieces to fit in a 1.25 inch telescope.

Step 1: Materials & Tools Needed

- 0.965 telescope eyepiece(s)
- Dishwasher hose adapter (or thick rubber tube with 1 inch inner diameter and 1.25 inch outer diameter)
- Telescope with 1.25 inch opening

- Hacksaw
- Vice (or something to hold the tube)

Step 2: Create Adapter

1. Place hose in vice (or whatever you are using to cut hose)
2. Cut to desired length. Two and a half inches should do it. If you are using the dishwasher hose adapter, cut right where the adapter goes down in size (see photo)

Step 3: Fit Adapter & Eyepiece in Telescope

In this step, I've taken the focuser off of my telescope. You do not need to do this. It is for illustration only.

1. Insert prepared hose (adapter) into the telescope focuser. It should fit snugly with no gaps
2. Tighten any thumbscrews to secure the adapter
3. Unscrew eyepiece element from any focal tube (optional/if applicable)
4. Insert eyepiece element into adapter. It should fit snugly

Step 4: View the Heavens

Enjoy using your new adapter with a variety of size eyepieces! Here is a photo I took through the eyepiece of my telescope.



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    6 Discussions


    Reply 9 years ago on Introduction

    Me too; I have a friend who can borrow keys for the university observatory telescopes and I want to get some astronomical photos through them but can't figure out a decent way to adapt my camera to the eyepiece. The best one I've taken so far was through a spotter scope with the camera at 10X optical zoom!


    Reply 9 years ago on Introduction

     Most amateur astrophotography is done using a USB webcam. You can buy an adapter that goes into the screw thread for the lens. Then, most people capture video and stack the frames to get the images.
    I don't know whether this would work on the telescope you're using though


    Reply 9 years ago on Introduction

    This site sells several kinds - it'll depend on your webcam/telescope.

    You may be able to find them cheaper if you look around though


    Reply 9 years ago on Introduction

    Why don't you ask that question in the "Answers" area of this site?

    Give them specific details about the lens you're trying to connect to and the exact model of the camera.