Askar 0.75x Reducer for 71F
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Vai al moduloAskar 0.75x Reducer for 71F
The Askar 0.75x reducer for the 71F telescope is designed to enhance imaging performance by shortening the focal length and increasing optical speed. Its optical triplet design supports a 44 mm full-frame image circle, making it suitable for DSLR and large-format astronomy cameras.
Standard Backfocus and Compatible Threading
The reducer provides a standard 55 mm backfocus from the M48 male thread, ensuring easy integration with common photographic setups. Both ends feature M59×1 threads, and the 71F photographic extension tube includes M54×0.75 and M48×0.75 adapters for direct connection.
Filter Support and CNC-Machined Construction
The included adapter features an integrated 2" filter thread (M48×0.75), allowing direct installation of standard filters. The reducer is fully CNC-machined for maximum durability and precision, and both ends are protected by threaded metal caps to prevent dust accumulation.
Technical Specifications
| Parameter | Value |
|---|---|
| Focal length after installation | 369 mm |
| Focal ratio after installation | f/5.2 |
| Optical design | Triplet |
| Backfocus | 55 mm (from M48 male thread) |
| Weight | 0.23 kg |
| Rear thread | M59×1 |