ABYN-125Inch Double Helical Focuser High Accuracy 10Mm Focusing Stroke Inner M42x075Mm Thread For Astronomical Telescope _x000D_ _x000D_ _x000D_ ABYN-1.25Inch Double Helical Focuser High Accuracy 10Mm Focusing Stroke Inner M42x0.75Mm Thread For Astronomical Telescope _x000D_ _x000D_ _x000D_ _x000D_ This is an excellent 1.25-inch double-threaded focuser with a 10mm adjustment stroke. It is light and compact, made of all metal, and durable._x000D_ During the focusing process, the inserted CDD eyepiece or zenith mirror remains non-rotating and only makes linear movements, which is conducive to observation and astronomical photography._x000D_ The meticulous craftsmanship makes its micro-focusing extremely precise, and it remains smooth and stable even at huge magnifications._x000D_ _x000D_ 1. new double-helix focuser_x000D_ 2. High-precision double-helix focuser for guide mirror/finder interface_x000D_ 3. Solution to slow focusing of telescopes or telephoto lenses_x000D_ 4. Made of all metal, durable_x000D_ Inner diameter 1.25inch_x000D_ Stroke 10mm_x000D_ Adjustment accuracy 0.05mm_x000D_ Top external thread M42x0.75_x000D_ Bottom internal thread M42x0.75_x000D_ Bottom inner ring external thread M31x0.5_x000D_ Minimum height 46mm_x000D_ Maximum height 56mm_x000D_ Colour:Black_x000D_ Material:Metal_x000D_ _x000D_ Package Contents:_x000D_ 1 x Double Helical Focuser_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ Note: Light reflection 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._x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ About We accept , we have a lot of experience in dropshiping and will not put any ads and materials in the order. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_