Ideal for visual observation and astrophotography, the Vixen Optics SD81S II Telescope Optical Tube Assembly
is designed for the amateur astronomer or photographer who wants to
view and photograph the moon, planets, and deep sky objects. The SD81S
II features FPL53 "super" extra-low dispersion (ED) glass in a fully
multicoated 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. It can accept both 2" and 1.25" eyepieces and accessories
for visual use. Threads on the drawtube allow direct connection of
T-rings and other camera mounts.
Included with the optical tube
assembly (OTA) is a flip-mirror diagonal with dual 1.25" 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 is placed in the back, and an eyepiece can be attached
at the top to check alignment and tracking between exposures. The OTA
includes a mounting ring assembly and a Vixen-style dovetail plate to
make it compatible with a wide variety of mounts. An integrated carry
handle makes set up and break down safe and easy.
[ITEMPRICE]