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Lumicon Low-Profile Focuser for 3 Inch Newtonian Base is a high-precision, pin-and-groove type helical 1.25" focuser. The low-profile design quickly and easily converts your standard Newtonian with a 3" base to a camera-ready telescope.

For visual use, the smooth focusing brings out the very best in your telescope’s optics. Accessories that take up back-focus, such Lumicon’s popular 1.25" Multiple Filter Selector, can be used with ease and convenience. The U-groove base aligns and sits flush on any telescope tube with a radius of 3.5" or larger. The draw-tube does not rotate.

Note: Visual use of the Low Profile Focuser requires either the Lumicon 1.25" Multiple Filter Selector or a 1.25" extension tube.