Askar 0.74x Reducer for the 111F - 111F-RED

Khan Scope Centre Verified independent store

→

Pre-Order Now for Arrival at Khan on May 22! The 0.74× reducer brings the Askar 111F's focal ratio down to F5.1, delivering a faster optical system while incorporating built-in fie ld-flattening correction to effectively eliminate field curvature - ensuring sharp and clear stars from the center to the very edges of the frame. The shorter focal ratio provides a wider field of view and shorter exposure times, making it particularly well-suited for capturing expansive nebulae, star clusters, and faint or fast-moving celestial objects. The Askar 111F 0.74× Reducer features a triplet optical design and supports a 44mm full-frame image circle. Its back focus is 55mm (measured from the M48 thread), and both ends feature M68×1 threads for optimal adaptability and stability. The 111F photographic extension tube includes M54×0.75 and M48×0.75 adapters, allowing for direct and convenient connection to the 111F 0.74× reducer. The reducer’s rear adapter ring features a built-in M48×0.75 standard 2-inch filter thread, enabling direct installation of various astronomical filters to accommodate different imaging needs. The entire reducer is precision CNC-machined and comes with front and rear metal threaded caps to protect the optics from dust when not in use. Specifications （After attaching）111F Focal length 566mm （After attaching）111F Focal ratio f/5.1 Lens Number Triplet design Back Focus 55mm（from the base of M48 male thread） Weight 0.5kg Rear-end thread type M68*1 Show more