Astronomical HAC125 SW2020630001 Sky-Watcher

Primary mirror effective diameter: 125mm / focal length: 250mm / aperture ratio: F2 Lens barrel mass: approx. 3.7kg (including lens barrel band and dovetail bar) / Lens barrel length: approx. 360mm (including hood and optical axis adjustment screw) / Lens barrel diameter: approx. 153mm Center shield: 53mm diameter / Focus stroke: 7.7mm Camera connection standard: CMOS camera for astronomical objects with an American size (31.7mm) sleeve nosepiece, and the sensor position is approximately 9.7mm or more from the base of the nosepiece. HAC125 is a high-speed astrograph with an aperture of 125mm, a focal length of 250mm, and an aperture ratio of f/2. This telescope is specialized for astronomical photography using a small CMOS camera for astronomical objects with a diameter of 53 mm or less, and exhibits excellent performance especially for radio viewing. ・HAC125 is an astrophotography lens barrel consisting of a spherical primary mirror and a correction lens, and its greatest features are its extremely bright aperture ratio and compactness that allows it to be easily operated even on a small mount. - The brightness provided by the f/2 aperture ratio can significantly shorten exposure time, and depending on the user's preferences and target celestial objects, it is possible to photograph faint celestial objects in a short time without using an autoguide system. In addition, relatively bright celestial objects such as nebulae can be displayed on the screen without using a live stack, making it suitable for use in radio viewing. ・The mass of the lens barrel is approximately 3.7kg including the lens barrel band and dovetail bar. It also supports operation on a small mount. - Attach the camera to the camera holder in the center of the correction lens, and rotate the focus ring on the camera holder to focus. The cameras that can be attached are limited to those with an American size (31.7mm) nosepiece, and those whose sensor position is 9.7mm or more from the base of the nosepiece. The image circle is approximately 16mm. -The lens hood is 99mm long and reduces condensation and stray light. It is removable and allows you to easily attach the camera. - Comes with two lens barrel bands and a narrow type (approximately 45mm) dovetail bar, which can be attached to many commercially available mounts. -Equipped with two mounts for attaching finder scopes, making it convenient for attaching finders and accessories. -The optical axis adjustment mechanism is equipped with a screw on the primary mirror side that can be adjusted without using tools.