This auction is for a lot of (4) Meade and other brands, possibly Celestron, focusing extenders/adapters mainly for astrophotography purposes. I do not know what each of these are as I've acquired them over the years, but I'll give you extremely accurate measurements/dimensions of each adapter so you may decide if they will work with your telescope project.

Each adapter is made of thick gauge anodized or machined aluminum. The adapters with the large, chrome plated brass set screws are from Meade.

DESCRIPTIONS OF EACH ADAPTER IS BASED IN ORDER FROM LEFT TO RIGHT AS SEEN IN THE FIRST PHOTO

Adapter #1   Brand:  unknown

                     Length:  3.0-inches

                     Outside diameter:  1.45-inches

                     Inside diameter:  0.99-inches

                     Thickness:  0.22-inches

                      Weight:  4oz

This adapter/extension has (2) small setscrews halfway down the tube, separated by 1.29-inches. Cosmetics are very excellent.

Adapter #2  Brand:  Meade

                    Length:  2.61-inches

                    Outside diameter of lower barrel male threads:  1.64-inches

                    Outside diameter of rest of barrel:  1.98-inches

                    Inside diameter of lower barrel:  1.52-inches

                    Inside diameter of rest of barrel:  1.74-inches

                    Thickness:  0.12-inches

                     Weight:  3.2oz

With this anodized aluminum adapter, the lower male threads will accept certain camera t-rings; like the Canon AF. The lower threads WILL THREAD to the top of adapter #3. **see photo 11** Cosmetics are excellent. The large chrome plated brass setscrew is original from Meade. The hex bolt is not original, but is a perfect fit.

Adapter #3  Brand:  Meade

                   Length:  3.35-inches 

                   Outside diameter:  1.74-inches

                   Inside diameter lower female threads:  1.48-inches

                   Inside diameter upper female threads  :  1.61-inches

                   Inside diameter of internal flange barrel:  1.24-inches

                   Thickness:  0.13-inches

                   Weight:  3.6oz

This anodized aluminum extender is in excellent condition and the setscrew is original. The top female threads WILL THREAD to the male threads of adapter #4 and it will also accept the male threads of adapter #2. **see photo 11**

Adapter #4  Brand:  Meade

                    Length:  1.55-inches

                    Outside diameter:  1.81-inches

                    Inside diameter above flange where (3) setscrews contact:  1.56-inches

                    Inside diameter rest of barrel:  1.40-inches

                    Weight:  2.4oz

This adapter is in great to great+ condition and the (3) setscrews are not original, but are a perfect fit. The male threads WILL THREAD to top of adapter #3  **see photo 12**

Packed with great care.

Combined shipping offered.