The Vixen ED80Sf is built with extra-low dispersion (ED) glass in a fully multi-coated apochromatic lens system that corrects for both spherical and chromatic aberrations, astigmatism, and off-axis comas. This correction creates a wide flat field of view without distortion and removes the blue-tinted "halo" effect for true high-contrast color transmission. Threads on the drawtube allow direct connection of T-rings and other camera mounts. Complementing the optical performance is a precision Crayford-style focuser that employs a tension control system to eliminate backlash and achieve tack-sharp views.
At only 22.4", this is our ultimate grab-n-go APO travel scope. Included with the optical tube assembly (OTA) is a flip-mirror diagonal with dual 1.25" eyepiece holders. The light path can be directed to the upper holder with the mirror in the up position, and to the rear holder by flipping it down. For visual observation, the mirror can hold two eyepieces to allow easy changes from low to high magnification. When using it for imaging, the camera or imaging system can be used in the back, and an eyepiece can be put on top to check alignment and tracking between exposures. The Vixen ED80Sf also includes an aluminum case, finder scope and rings.