A Meade #777 Off-Axis Guider is a great help for making long-exposure photographs of the stars. It allows you to monitor your telescope's tracking, and to make sure it remains positioned on whatever you're photographing. Among telescope accessories, the off-axis glider is a must-have to achieve high quality work. Such capability is pivotal during long-exposure astrophotography. The Meade #777 Off-Axis Guider allows the photographer to monitor the telescope's tracking and ensure that it remains perfectly positioned on the object being photographed. Such capability is pivotal during long-exposure astrophotography. The telescope accessory Meade #777 Off-Axis Guider is like the T-Adapter, in that the Guider couples the camera body to the telescope. It also causes a small amount of the guidestar's incoming light to be diverted at a right-angle, where the star's position can be examined for tracking errors with the crossline pattern of the PL9mm Illuminated Reticle Eyepiece or other guiding devices. With the Meade #777 Off-Axis Guider, any necessary position corrections can then be made using the telescope's drive systems. The #777 works with any LX-Series telescope or other Schmidt-Cassegrain. Use with the appropriate T-Mount, ordered separately, for your 35mm camera brand. Note: The #777 Off-Axis Guider also works with ED Apochromatic Refractors. Just add the Universal Thread Adapter along with the T-Mount to the Guider to begin your photographic guiding applications. Shop for the Meade #777 Off-Axis Guider, and create your own long-exposure photos.