Askar 0.74x Reducer for 131F
Askar 0.74x Reducer for 131F
This 0.74X Reducer is the ideal companion for the Askar 131F telescope, reducing the focal ratio from f/7.5 to f/5.6. This dramatically shortens exposure times, allowing you to effortlessly capture wide-field nebulae, dense star clusters, as well as faint or fast-moving celestial objects. It also incorporates field-flattening correction capabilities, effectively eliminating field curvature to ensure sharp, clear stars from the center to the edges of the frame. Featuring a triplet optical lens design, this reducer supports a 44mm full-frame image circle. It has a standard back focus of 55mm (measured from the M48 thread), with M72×1 threads on both ends. The package includes an extension tube and comes with both M54×0.75 and M48×0.75 adapter rings that connect directly to the reducer for easy installation. The rear adapter ring features a built-in M48×0.75 thread, enabling direct attachment of 2-inch filters. Constructed using CNC machining, the reducer is equipped with metal thread caps on both ends. These caps protect the optics and offer convenient dust-proof storage, reflecting the product's professional quality.
Specifications
- Reduction Factor: 0.74X
- Askar 131F Flat-Field Refractor Focal Length w/ Reducer: 727mm
- Askar 131F Flat-Field Refractor Focal Ratio w/ Reducer: f/5.5
- Optical Design: Triplet
- Back Focus: 55mm
- Weight: 1.2 lb.
- Connection: M72x1