Telescope Accessory Set M54x0.75 Metal Focal Length Extension Tube Kits 4/5/6/7/8/9mm for Astronomical Telescope Photography Extending T Ring Telescope Camera

You can reach the extension length required by combining several extenders of different lengths.The Extension Ring has length of 4mm,5mm,6mm,7mm,8mm,9mm.Outer diameter: 60mmmale thread length: 3mm4mm-female thread length is 3mm5mm-female thread length is 4mm6mm-female thread length is 4.5mm7mm-female thread length is 5.5mm8mm-female thread length is 6mm9mm-female thread length is 7mmFeatures:1.Male thread - M54*0.75. Female thread - M54*0.75, eliminates a range of focusing problems.2.The extension tube has a M54*0.75 interior thread and a M54*0.75 exterior thread for elegantly solving spacing problems in astrophotography.3.Use this extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners.4.All metal construction and anodizing aluminium process, durable for long time use.5.The required spacing can be achieved by combining several extenders of differing lengths,you can use 1 piece, 2 pieces , 3 pieces, 4 pieces,5 piecesor 6 pieces of the extension rings as you like.Package Includes:1x M54*0.75 Extension Tube Kit Length 4mm 5mm 6mm 7mm 8mm 9mmOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.

• Male thread - M54*0.75. Female thread - M54*0.75, eliminates a range of focusing problems.
• Use this extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners.
• You can reach the extension length required by combining several extenders of different lengths. The Extension Ring has length of 4mm,5mm,6mm,7mm,8mm,9mm.
• It can adjust eyepiece location;help you to get more sharp image.
• Application:Support all types of telescopes, reflector, refractor, to observe the star clusters, moon, , planets and other celestial bodies.