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Products description
Sharpstar 0.75x Reducer for 61EDPH III
With the reducer, the focal ratio of 61EDPH Ⅲ is reduced to f/4.4 and the focal length is reduced to 270 mm, making the telescope the first choice for deep sky astrophotography.
♦ Specially calculated for 61EDPH III
♦ Quadruplet design for high image quality
♦ Focal reduction by 0.75x
♦ Focal length with 61EDPH III: 270 mm, f/4.4
♦ 44 mm corrected field of view (full-frame format)
♦ Camera connection via M48 thread (55 mm working distance) or M54 thread (75 mm working distance)
Sharpstar 0.75x Full-Frame Reducer for 61EDPH III
The reducer adopts an air-spaced quadruplet structure, supporting full-frame imaging. With the reducer, the focal ratio of 61EDPH Ⅲ is reduced to f/4.4 and the focal length is reduced to 270 mm, making the telescope the first choice for deep sky astrophotography.
One end of the reducer features an M68×1 female thread to connect to the focuser draewtube, the other end of the reducer has an M48×0.75 male thread with built-in 2" filter thread. The back focus is 55 mm. If it needs to be extended, the reducer can be split to reveal an M54×0.75 female thread, and the back focus becomes 75 mm.
| Structure: | Air-spaced quadruplet design, fully multi-coated |
| Intended for telescopes: | Sharpstar 61EDPH III |
| Focal length reduction: | 0.75x |
| Focal length with 61EDPH III: | 270 mm, f/4.4 |
| Corrected and illuminated field of view: | 44 mm |
| Telescope side connection: | M68x1 female thread for 61EDPH III pullout |
| Camera side connection: | M54x0.75 female thread, M48x0.75 male thread with 2" filter thread |
| Backfocus: | 55 mm from M48 thread, 75 mm from M54 thread |
| Weight: | 0.4 kg |
In the box:
♦ Reducer
♦ Dust caps
Die Box kann unter tpl_modified/boxes/box_miscellaneous.html verändert werden. Die Sprachvariablen befinden sich in der Datei tpl_modified/lang/german/lang_german.custom.