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Use the Sky-Watcher Evostar ED APO 150mm f/8 Guidescope
to improve the precision of your autoguiding system, for wide-field
astrophotography, or as an exceptional platform for observation
The large 150mm aperture is complemented by an extra
low-dispersion (ED) element set in a doublet apochromatic lens design.
These two optical features make the Evostar much more precise than
standard refractors and guidecopes, producing crisp and clear
high-resolution views with limited edge distortion and accurate color
representation. To achieve the sharpest focus possible, Sky-Watcher
utilizes a Crayford-style focuser. Unlike a conventional rack-and-pinion
system, the focuser utilizes a toothless friction mechanism that
smoothly moves the drawtube without the backlash that rack-and-pinion
focusers suffer from. The focuser has a large 2" drawtube to accommodate
full-frame imaging sensors without vignetting.
cradle-ring assembly clamps over the optical tube assembly (OTA) and
lets the user adjust the orientation and position of the scope relative
to the mount to optimize viewing comfort and to help with balancing,
while avoiding interference with other equipment. The scope is offered
without a mount or tripod, but a Vixen-style dovetail plate makes it
compatible with any mount head with a Vixen-style saddle. Protecting the
optical tube and accessories during transport and storage, a hard
aluminum carrying case is provided.