DeltaOptical/GSO SuperView 50mm 60° 2″ eyepiece
If you are looking for an eyepiece that opens up a truly panoramic view of the night sky, the DeltaOptical/GSO SuperView 50mm eyepiece is exactly what you need. With a focal length of 50mm and a barrel diameter of 2″, this piece belongs to the category of large, comfortable eyepieces designed primarily for survey observation - for situations where you want to take in as much of the sky as possible and enjoy the context of celestial objects within their surroundings.
60° field of view - a real step forward
The 60° apparent field of view in the SuperView series represents a significant improvement over classic Plossl eyepieces, which typically offer around 50-52°. In practice, this means that at the same magnification you see considerably more sky at once:
- Large nebulae such as the Orion Nebula or the Andromeda Galaxy fit entirely within the field of view
- Star clusters appear natural and three-dimensional
- Tracking the motion of planets is more comfortable
- Finding objects is easier, especially for beginners
- Experienced observers can enjoy relaxed visual sweeps of the deep sky
Focal length 50mm - your finder and overview eyepiece
The 50mm focal length makes this eyepiece a typical finder or overview tool - an instrument for initial orientation on the sky and for observing extended objects at low magnification. The resulting magnification depends on the focal length of your telescope:
| Telescope focal length |
Resulting magnification |
| 600mm (e.g. short refractor) |
12x |
| 1200mm (e.g. Newtonian) |
24x |
The exit pupil is sufficiently large for comfortable viewing even without precise eye positioning.
Who is this eyepiece designed for?
A deep sky eyepiece of this type will be appreciated by owners of medium-sized and large telescopes - Newtonians, Dobsonians or apochromatic refractors with a 2″ focuser. Particularly with Dobsonians featuring a large mirror aperture and a relatively short focal length, a 50mm wide-field eyepiece is indispensable for comfortable searching and visual surveys of extended objects.
This eyepiece is also an excellent choice for observers who are just starting out in astronomy and want to enjoy spectacular views of star clusters or nebulae without the need for precise aiming.
If you are currently working only with 1.25″ eyepieces and considering a move to the larger 2″ format, this eyepiece is the ideal first step - you will notice the difference in comfort and field width immediately.
Construction and optics
The eyepiece is produced in cooperation between DeltaOptical and GSO. GSO (Guan Sheng Optical) is a Taiwanese manufacturer with a long tradition of producing quality astronomical optics. Key features include:
- Multi-layer anti-reflection coatings on all optical surfaces for maximum light transmission
- Robust and well-finished eyepiece body
- Standard 2″ barrel diameter
- Reliable and affordable instrument for demanding visual observers
Technical specifications
| Parameter |
Value |
| Focal length |
50mm |
| Apparent field of view |
60° |
| Barrel diameter |
2″ |
| Optical coatings |
Multi-layer anti-reflection |
| Manufacturer |
DeltaOptical / GSO (Guan Sheng Optical, Taiwan) |
