Together with the focal reducer, the triplet apo becomes an astrograph with 270 mm focal length and a fast focal ratio of f/4.4 - excellent for deep sky!
♦ Air-spaced triplet apo, together with a quadruplet reducer - seven elements in total
♦ 61 mm aperture
♦ 270 mm focal length
♦ Focal ratio f/4.4
♦ Flattener optional, therefore versatile
♦ Stable focuser with 360° rotation
♦ Camera connection: M48 thread (55 mm working distance) or M54 thread (75 mm working distance)
♦ 44 mm image circle, suitable for full-frame sensors
♦ Lightweight (approx. 2.4 kg) and compact (272 mm length without reducer, 75 mm tube diameter, 87 mm maximum diameter, 144 mm height) -- suitable for air travel
♦ Comes with many mounting options
Sharpstar 61EDPH III 61 mm f/4.4 Triplet Apo (using 0.75x Reducer)
Sharpstar 61EDPH III 61 mm f/4.4 Triplet Apochromat (using 0.75x Reducer)
The 61EDPH series has long been popular with astrophotography amateurs, in order to have a better user experience for users, Sharpstar has optimized the 61EDPHI Ⅱ and launched the 61EDPH Ⅲ. 61EDPH Ⅲ has more diverse functions and greater performance. It is a great choice that can´t be missed by astrophotographers.
The 61EDPH Ⅲ still has high-quality optical standards like before and adopts an air-spaced triplet APO design. Compared to the 61EDPHⅡ, it upgraded to two pieces of low dispersion ED glass for more excellent imaging performance. Together with the 0.75x reducer, the 61EDPH III forms a telescope for high quality astrophotography. The combination has a focal length of 270 mm, a focal ratio of f/4.4 and supports the 44 mm full-frame image circle. It represents a high-quality portable telescope.
The 61EDPH Ⅲ upgraded the handle of the 61EDPHⅡ to a multifunctional handle, which provides an additional universal Vixen style finder base. In addition, the 61EDPHⅢ is equipped with a 200 mm long vixen dovetail plate, easier to connect to the equatorial mounts and accessories, and makes the OTA easier to balance on the mount. The appearance has smooth and natural lines, with the classic red and white color scheme, very simple and generous. The tube uses high-quality CNC machining, high-grade surface painting, and polished oxidation, elaborate and durable.
The included full-frame reducer: The reducer adopts an air-spaced quadruplet structure, supporting full-frame imaging.
One end of the reducer features an M68×1 female 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 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.
The optional full-frame flattener: The flattener adopts an air-spaced triplet structure, supporting full-frame imaging. The telescope has a focal length of 360 mm and a focal ratio of f/5.9 when using the flattener.
One end of the flattener features an M68×1 female 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 55 mm. If it needs to be extended, the flattener can be split to reveal an M54×0.75 female thread, and the back focus becomes 81.5 mm.
