Male thread - M42*0.75. Female thread - M42*0.75,eliminates a range of focusing problems.
All metal construction and anodizing aluminium process, durable for long time use.
Use this extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners.
The extension tube has a T2 interior thread and a T2 exterior thread for elegantly solving spacing problems in astrophotography.
The required spacing can be achieved by combining several extenders of differing lengths,you can use 1 piece, 2 pieces , 3 pieces or 4 pieces of the extension rings as you like.
Alstar 2" 2.5X Barlow Lens - Allows The Use of Both 2" and 1.25" Eyepieces
KWD 35.500
Alstar Alignment 1.25" Next Generation Laser Collimator for Newtonian Telescopes
KWD 10
Alstar 1.25" High Precision Double Helical Focuser with 0.1mm Scale for Telescope Lenses/Finder & Guidescope
KWD 20
Alstar 1.25" 5mm 58-Degree Planetary Eyepiece for Telescope
KWD 20.500
