The perfect companion piece for observers and imagers who frequently change eyepieces during their astronomy sessions, the Alpine Astronomical Baader Q-Turret 4-Eyepiece Holder is designed to hold up to four eyepieces for faster and easier changes. For expanded use, the turret can also be used with Barlows for even more magnification options, or with CCD imaging systems. Its single 1.25" barrel fits into your telescope's drawtube or visual back and is threaded for standard 1.25" eyepiece filters, eliminating the need to swap filters when you change eyepieces and making viewing much more enjoyable. The four eyepiece holders get loaded with your eyepieces, and you simply rotate the turret to switch them. When using the turret with imaging systems, you gain the benefit of the camera being parfocal with the eyepieces, enabling fast and accurate focusing without the frustration and guesswork commonly associated with trying to focus an imager on a computer screen.