Tele Vue 0.25" Accessory Tube For 2.4" (TLA-0250) 20x Binoculars which is of great convenience

which is of great convenience for composition when imaging the deep-sky objects

Dazzling Views with High Quality Optics

rock-solid focusing with zero image shift

you'll be able to enjoy a wide range of high and low power views—and switch between them quickly and easily

The Baader clear glass filters are used to focus a camera when using very narrow band line filters (due to same mechanical thickness)

Tele Vue 0.25" Accessory Tube For 2.4" (TLA-0250) 20x Binoculars which is of great convenience0. 25" Length Accessory Tube for 2. 4" adds 0. 250" (6. 4mm) extension between Imaging System accessories. Focuser extensions of various lengths are often used to create the necessary distance for proper spacing of field lenses to imager; the required distance will vary depending on camera specifications. All are black anodized aluminum with anti reflection threads for maximum contrast.