Optec Sagitta Off-Axis Guider

An off-axis guider eliminates differential flexure, which is the slight movement between your main imaging telescope and a guide scope that often ruins long-exposure images. By using the same optical path as your main camera, the Sagitta ensures your guiding is perfectly locked to your imaging sensor.

Yes, the Sagitta requires a FocusLynx control hub to operate the motorized focus. It will not function as a remote-focusing unit without this specific controller.

The 3-inch clear aperture is designed to minimize obstruction, but whether you experience vignetting depends on the size of your camera's sensor and your overall imaging train. It is generally well-suited for full-frame sensors, but you should verify your back-focus requirements to ensure the pick-off prism doesn't intrude into your primary light path.

The unit features a dedicated stepper motor that moves the guide camera independently of the main imaging camera. This allows you to achieve sharp focus on your guide star without needing to adjust the position or focus of your primary imaging camera.

Absolutely. The Sagitta is built with stainless steel and brass components specifically for the rigors of unattended, remote imaging. Its robust construction ensures it maintains mechanical alignment over long periods without needing constant adjustment.

The body thickness is 1.25 inches. You will need to account for this distance when calculating the total back-focus of your imaging train to ensure you can still reach focus with your main camera.