0.74X Full Frame Reducer F5.6 M72 Astronomical Accessory Dedicated for ASKAR 131F Telescope

Introduction:
- This 0.74X Reducer is the ideal companion for the 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 M72x1 threads on both ends. The package includes an extension tube and comes with both M54x0.75 and M48x0.75 adapter rings that connect directly to the reducer for easy installation. The rear adapter ring features a built-in M48x0.75 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.

Specification:
- (After attaching) 131F Focal length: 733.6mm
- (After attaching) 131F Focal ratio: f/5.6
- Lens Number: Triplet design
- Back Focus: 55mm (from the base of M48 male thread)
- Weight: 0.56kg
- Rear-end thread type: M72x1

Package Included:
- 1 x Reducer