SharpStar 61EDPH III f/5.9 Triplet ED APO Telescope

Sharpstar upgraded the triplet air-spaced APO optical design for this new V III model. It now has two low-dispersion ED glass lenses (its predecessors had one) for enhanced performance.

Sharpstar has also upgraded the handle with a new multifunctional design that can be connected to the universal vixen-style finder base. In addition, the 61EDPH is equipped with a longer 200mm Vixen-type dovetail plate for connection to equatorial mounts and accessories, which makes the OTA easier to balance on the mount.

With a focal length of 360mm and a fast focal ratio of f/5.9, the fully multi-coated optics provide excellent colour correction and image sharpness in a highly compact design.

The internally-blackened aluminium optical tube further enhances the performance by maximising image contrast. The optical tube is 272mm long when the dew shield is retracted.

The 61EDPH III is equipped with a 2.5″ dual-speed rack-and-pinion precision focuser. The focuser is fully rotatable by 360 degrees to enable easy framing of targets on the camera sensor.

An optional full-frame reducer and a full-frame flattener are available for the 61EDPH : The back focus is 55mm. One end of the reducer or flattener features an M68 x 1 thread to connect to the focuser drawtube; Camera side, the reducer and flattener features an M48 x .75 thread and has a built-in 2″ filter thread. If more back focus distance is required, the reducer and flattener can be split to reveal an M54 × 0.75 male thread, and the back focus then becomes 75mm (Reducer) and 81.5mm (Flattener)

The focuser adopts a quadruplet air-spaced structure, supporting full-frame imaging. With the reducer, the focal ratio of the 61EDPH reduced to F4.5 and the focal length is reduced to 270mm, and this is considered the best choice for deep sky astrophotography.

With its excellent colour correction, the 61EDPH III also works well for grab-and-go visual astronomy (without the focal reducer).

It is supplied with anodised tube rings, a carrying handle, and a finderscope mounting bracket. It also includes a 1.25″-2″ adapter for use with smaller diagonals and eyepieces.

Read more at https://shop.git.co.za/Sharpstar-61EDPH-III-61-mm-APO-Refractor-OTA-p598156305

What’s in the box
Sharpstar 61EDPH III Refractor Optical Tube
Tube Ring
200 mm Dovetail Plate
Multi-Functional Handle