Askar 91F Flat-Field Telescope, 91mm Aperture F6.7, ED Glass Refractor OTA, Quadruplet air-Spaced APO, 230mm Vixen Dovetail Plate for Deep Sky Astrophotography and Visual Astronomy

Askar 91F Flat-Field Telescope, 91mm Aperture F6.7, ED Glass Refractor OTA, Quadruplet air-Spaced APO, 230mm Vixen Dovetail Plate for Deep Sky Astrophotography and Visual Astronomy

• The Askar 91F is an OTA with an aperture of 91mm, a focal length of 609mm, and a native focal ratio of F6.7. The optical design of the Askar 91F features a four-element configuration (three elements in the front and one in the rear), including one piece of ED glass， which can effectively reduce chromatic aberration.
• The entire lens barrel uses high-quality CNC processing technology, and the interior of the lens barrel is painted with high-quality matte paint to effectively reduce stray light reflection
• Askar 91F can be used for both visual observation and photography,very suitable for watching birds and scenery.
• Convenient for photographic composition and visual observation, just loose the screws the focus can be rotated 360 degrees, then you can achieve astronomical shooting
• The Askar 91F’s handle is 130mm long and has a finder base slot. Besides, there are two finder bases on both sides of the focuser, which not only eliminates the need for disassembling when changing the position of the finder scope but also provides additional mounting positions for other astronomical accessories.