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Vixen Optics' ED81S 80mm f/7.7 Apochromatic Refractor Telescope is an ideal optic for both celestial observation and astrophotography. Optically, it is designed with a fully multi-coated, apochromatic extra low-dispersion (ED) lens system that corrects both spherical and chromatic aberrations. This correction creates a wide flat field of view without distortion and removes the blue-tinted "halo" affect for true high-contrast color transmission. The optical tube assembly is made in Japan.
The scope can be used for multiple astrophotography techniques included prime-focus, afocal imaging, or eyepiece projection. A traditional rack-and-pinion focuser, with adapter rings, is employed to be able to handle the heavier loads of astrophotography rigs, and can accept 1.25" eyepieces and accessories for making visual observations. Vixen includes a flip-mirror diagonal that allows the use of two different eyepieces for observational flexibility, or an eyepiece and imaging system that lets users simply flip the mirror to check alignment and tracking accuracy between exposures without having to touch the imager. While the OTA is offered here without a mount or tripod, a Vixen-style dovetail plate that fits on compatible saddles is included, along with a mounting ring assembly with an integrated carrying handle to make set up and breakdown easier.
f/7.7 focal ratio
625mm focal length
Refractor optical system
Anti-reflection multi-coated optics improves light transmission for brighter, high-contrast images
Apochromatic lens configuration corrects for spherical and chromatic aberration to produce distortion-free images with accurate color representation
Extra low-dispersion (ED) glass elements correct for chromatic aberration to increase true color fidelity and improved contrast
Resolution: 1.43 arc sec
OTA only, requires user-supplied mount and tripod
Included tube ring
Set of two rings
Integrated Vixen-style dovetail plate
Sturdy rack-and-pinion style
60mm mounting thread for push-fit holder or threaded accessories
90° flip mirror with two 1.25" eyepiece holders
42mm thread on straight-view for optional T-ring or other imaging accessories