What makes the SharpStar 50EDPH's optics special for its size?
The SharpStar 50EDPH uses a triplet air-spaced apochromatic (APO) objective that includes two ED glass elements. A triplet design is rare for a telescope of such a small aperture, and its chromatic aberration control is exceptional.
How do I mount the SharpStar 50EDPH?
The telescope comes with a 70mm Vixen-style dovetail plate. This plate fits most equatorial mounts. Additionally, it has slotted 1/4-20 threaded holes, allowing you to mount it directly on a standard photographic tripod for quick sessions.
What are the included M48 extension tubes for on the 50EDPH?
The two 5cm M48 extension tubes come as standard. They can be connected to the eyepiece for visual observation instead of the diagonal, or to a planetary camera for planetary imaging.
Can I use the SharpStar 50EDPH for visual observation of the Orion Nebula (M42)?
Yes. The 275mm focal length provides a very wide field of view, perfect for framing large objects like the Orion Nebula (M42) in its entirety. Paired with a low-power 1.25" eyepiece, you can easily fit the nebula and its surrounding star-forming regions into a single, immersive view.
Is the SharpStar 50EDPH suitable for imaging the Andromeda Galaxy (M31) with a DSLR?
The 50EDPH is an excellent choice for imaging large targets like the Andromeda Galaxy (M31). Its 275mm focal length is a great match for framing the full extent of the galaxy on APS-C sensors. No native image circle is stated; for a flattened field there is the optional 0.84x reducer (f/4.6), which supports an APS-C frame.
What are the limitations of a 50mm aperture on the SharpStar 50EDPH?
A 50mm aperture excels at wide-field views and portability rather than high magnification, since resolving power and light grasp grow with aperture. Its limiting visual magnitude is 10.3, so small, faint galaxies show little detail. Its strength lies in capturing large nebulae, star clusters, and vast sections of the Milky Way.
Can I use the SharpStar 50EDPH as a guide scope?
It can be. The 50EDPH is meant for observing and imaging rather than as a dedicated guide scope, but a small refractor with a guide camera at focus can serve for guiding. Its 1.07kg weight with the dovetail plate keeps the extra load on the mount light.
How does the 360° rotator on the 50EDPH improve imaging?
The 360° rotator, placed in front of the focuser, lets you change the orientation of your camera without unthreading it, and a rotator locking screw holds the chosen angle. This helps you frame your target precisely, for example aligning the long axis of a galaxy with the long side of the sensor.
What eyepieces work well with the SharpStar 50EDPH for visual use?
Any 1.25" eyepiece fits the rear 1.25" visual adapter, with a diagonal or with the M48 extension tubes for straight-through viewing. Magnification is 275mm divided by the eyepiece focal length, so a 25mm eyepiece gives 11x for wide views of the Milky Way or the Pleiades (M45). A common rule of thumb puts the highest useful magnification near twice the aperture in millimeters, about 100x.
Do I need the optional reducer for the SharpStar 50EDPH?
The optional 0.84x reducer is recommended if your primary goal is wide-field astrophotography of large nebulae. It reduces the focal length to 230mm and the focal ratio to f/4.6, so the same signal takes about 70% of the exposure time needed at the native f/5.5, and it adds field flattening for an APS-C frame. For visual use or imaging smaller targets, the reducer is not necessary.
