APM RICCARDI 0.75x REDUCER M82
APM
APM RICCARDI 0.75x REDUCER M82 is backordered and will ship as soon as it is back in stock.
The APM Riccardi 0.75x Reducer M82 is a high quality triplet ED reducer/flattener for large apochromatic refractors. It is compatible with many large apo refractors such as APM LZOS triplets which have an M82 x 1 thread, as well as Sky-Watcher Esprit triplets and GSO Ritchey-Chretien telescopes from 10" and larger.
Designed by legendary optical designer Massimo Riccardi, this reducer provides a fully corrected field of 52mm and transforms your telescope into a true astrograph.
The APM Riccardi Reducer features multi-coatings optimized for the spectral range of modern sensors. An optional tilter is available for precise adjustment of the field to optimize star shapes in the corners of the frame.
Note: As this reducer has M82 x 1 threads on both the telescope- and camera-side, additional adapters may be required to attach it to your imaging train.
Specifications
| Telescope side connection |
M82 x 1 male |
|---|---|
| Camera side connection |
M82 x 1 female |
| Backfocus distance | Varies - see "Backfocus" tab |
| Coating |
Multi-coating |
| Reduction factor |
0.75x |
| Corrected field |
52 mm |
| SKU | APM-RIRED-M82-large |
Backfocus
| Apo refractor with focal length < 650 mm |
80.7 mm from end of M82 threads |
|---|---|
| Apo refractor with focal length 660 - 700 mm | 80.0 mm from end of M82 threads |
| Apo refractor with focal length 710 - 780 mm | 77.4 mm from end of M82 threads |
| Apo refractor with focal length 790 - 800 mm | 76.5 mm from end of M82 threads |
| Apo refractor with focal length 810 - 1000 mm | 76 mm from end of M82 threads |
| Apo refractor with focal length > 1000 mm | 75 mm from end of M82 threads |
| Sky-Watcher Esprit 120 | 77.1 mm from end of M82 threads |
| Sky-Watcher Esprit 150 | 77 mm from end of M82 threads |
| GSO RC from 10" and larger | 76 mm from end of M82 threads |
