Sharpstar 61 EDPH III (incl. x0.75 Reducer)

Sharpstar 61EDPH III 61mm Triplet Apochromat:

Note: These Telescopes are ordered directly from the Manufacturer which can have an additional lead time. Feel free to contact us for more info if needed.

The 61EDPH series has long been popular with astrophotography amateurs, in order to have a better user experience for users, Sharpstar has optimized the 61EDPH II and launched the 61EDPH III which has more diverse functions and greater performance.

The 61EDPH III still has high-quality optical standards like before and adopts an air-spaced triplet APO design. However, compared to the 61EDPH II, it has an upgraded two pieces low dispersion ED glass for more excellent imaging performance. 61EDPH III (without reducer) has a focal length of 360mm, a focal ratio of f5.9, and supports the 44mm full-frame image circle. Its also a high-quality portable telescope.

The 61EDPH III upgraded the handle of the 61EDPH II to a multifunctional handle, which provides an additional universal Vixen style finder base. In addition to this, the 61EDPH III is equipped with a 200mm long Vixen style dovetail plate, easier to connect to the equatorial mounts and accessories, and makes the OTA easier to balance on the mount. As before, the tube uses high-quality CNC machining, high-grade surface painting, and polished oxidation, which is both elaborate and durable.

The x0.75 Reducer (included)

The special full-frame reducer: On this reducer, one end of the reducer features an M68×1 thread to connect to the focuser drawtube, the other end of the reducer has an M48×0.75 male thread with built-in 2" filter thread. The back focus is 55mm. If it needs to be extended, this reducer can also be split to reveal an M54×0.75 female thread, and then the back focus becomes 75mm. The reducer adopts an air-spaced quadruplet structure, supporting full-frame imaging. With the reducer installed, the focal ratio of 61EDPH III is reduced to f/4.5 and the focal length reduced to 270mm.

An optional full-frame flattener and a full-frame reducer are available for the 61EDPH III, providing users with even more options:
The special full-frame flattener: One end of the flattener features an M68×1 male thread to connect to the focuser drawtube, the other end of the flattener has an M48×0.75 male thread with built-in 2" filter thread. The back focus is 55mm. If it needs to be extended further, the flattener can be split to reveal an M54×0.75 female thread, and the back focus becomes 81.5mm. The flattener adopts an air-spaced triplet structure, the peripheral light reduction control is excellent and can effectively improve the curvature of the field which improves the corner image quality, and reduces aberrations.

Spec:

• Lens: Air-spaced triplet apo (including two ED glasses)
  
• Corrector: Air-spaced quadruplet design, fully multi-coated
  
• Aperture: 61mm
  
• Focal length: 270mm (Reducer installed)
  
• Focal ratio: f/4.4 (Reducer installed)
  
• Limiting visual magnitude: 10.7
  
• Resolution: 1.93 arc seconds
  
• Image circle: 44mm
  
• Focuser: 2.5" dual-speed rack-and-pinion precision focuser, 360 rotatable
  
• Back side connections: M48x0.75 male thread, M54x0.75 male thread with increased back focus
  
• Back side connections without reducer:    M68x1 male thread, 2", 1.25"
  
• Back focus: 55mm (75mm from M54 thread)
  
• Finder shoe: For Vixen type finder brackets
  
• Mounting options: Vixen style dovetail bar (200mm) with 1/4-20 photo thread and 6 M6 threads, handle with ARCA-SWISS slot
  
• Tube material: Aluminum
  
• Transport length: 272mm
  
• Tube outer diameter: 75mm
  
• Dew shield diameter: 82.6mm (87.2mm with cap)
  
• Telescope height: 144mm
  
• Weight: approx. 2.4kg

Whats included:

1. SharpStar 61EDPH III Triplet APO Refractor
   
2. 0.75x reducer
   
3. 2" and 1.25" eyepiece adapters
   
4. Covers
   
5. Finder shoe
   
6. Tube ring
   
7. Dovetail bar
   
8. Handle