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Sharpstar 0.8x Reducer/Flattener (support Full Frame) for 94EDPH
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รายละเอียด
Sharpstar 0.8x Reducer/Flattener (support Full Frame) for 94EDPH
The Sharpstar 2.5" 94EDPH F/4.4 redcuer/flattener is the latest development in dedicated full-frame focal reducers. Designed to work with the Sharpstar 94EDPH apochromatic refractor, this 0.8x reducer and flattener meets the needs of demanding astrophotographers who use cameras with up to full-frame sensors for wide-field deep-sky imaging. It reduces the 94EDPH's effective focal length to 414mm.
This focal reducer features a quadruplet air-spaced structure and large optics that achieve excellent field flatness and illumination over a 50mm image circle. This larger image allows for enhanced mitigation of the decrease in egde of field illumination.
One end of the reducer features a M74×1 thread that connects to the pinion focuser. The other end uses a M48×0.75 thread to attach to the camera or a 48mm T-ring for a DSLR. The focal plane is 55mm from the end interface.
The reducer also features a built-in 360-degree rotator that allows you to easily rotate the camera to achieve the best image framing. An internal M48x0.75 female thread allows the use of standard 2" filters.
- Use for telescope models: Sharpstar 94EDPH
- Reducing focal ratio: f/4.5 (0.8x)
- Image circle: 44mm
- The lens type: Triplet
- The largest diameter: 88mm
- Back focus: 55mm
- Total length: 105mm (including M48 thread)
- Surface coating: Fully Multi-Coated
- Weight: 0.67kg
Schematics
Astrophoto
(click for higher resolution)