Svbony Barlow Lens 0.5X Focal Reducer Thread M28x0.6 for 1.25" 31.7mm Telescope Eyepiece, Shorten Length, Metal Material, Used Planetary Vision

M28.5x0.6mm thread; the 0.5X focal reducers has standard 1.25inch telescope threads M28.5x0.6 and fits any 1.25 inch eyepiece diagonal extender tube camera adaptor Shorten focal length; the focal reducer shorten the focal length and increasing the field of view; when used for planetary vision; almost the entire field of view of the planet can be seen Clear and bright image; the 0.5X focal reducers uses pure optical lenses to meet the needs of daily observation; and you can see clear images of the moon; planets; and nebulae Metal material; the 0.5X focal reducers made of anodized aluminum is very stury and durable Easy to use; insert the eyepiece into the 0.5X focal reducers; insert the 0.5X focal reducers into the zenith mirror; adjust the focus wheel