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  3. 0.74X Reducer F5.1 M68 Triplet Lens Design Astronomical Reducer Dedicated for ASKAR 111F Telescope
От TeSeek Official

0.74X Reducer F5.1 M68 Triplet Lens Design Astronomical Reducer Dedicated for ASKAR 111F Telescope

$303.89
$303.89
SKU: 102229
Tags:
$303.89
$303.89

Specifications

Brand

Teseek official

Technical specs

Design and durability

Introduction:
- The 0.74X reducer brings the 111F's focal ratio down to F5.1, delivering a faster optical system while incorporating built-in field-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 111F 0.74X 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 M68x1 threads for optimal adaptability and stability.

- The 111F photographic extension tube includes M54x0.75 and M48x0.75 adapters, allowing for direct and convenient connection to the 111F 0.74X reducer. The reducer’s rear adapter ring features a built-in M48x0.75 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.

Specification:
- (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: M68x1

Package Included:
- 1 x Reducer


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