Binorum DeepSky SuperView 50mm 60° 2″ Wide-Angle Eyepiece
Expansive Views of the Deep-Sky Universe
The Binorum DeepSky SuperView represents the perfect solution for observers seeking immersive, wide-field views of the cosmos. This exceptional wide-angle eyepiece features a proven 5-element Erfle optical design combined with a generous 60° apparent field of view, making it an indispensable tool for spectacular observation of deep-sky objects including nebulae, galaxies, star clusters, and extended celestial structures.
With its 2″ barrel diameter and 50mm focal length, this eyepiece is specifically engineered for low to moderate magnification applications where field width matters most. The SuperView design provides significantly more observing possibilities compared to traditional Plössl eyepieces, revealing more of the sky in a single view and creating a more immersive observing experience.
Classic Erfle Design for Modern Observers
The 5-element Erfle configuration has been a favorite among deep-sky enthusiasts for generations, and for good reason. This time-tested optical formula delivers excellent edge-to-edge sharpness across the entire 60° field while maintaining good contrast and minimal distortion. The result is a viewing experience that draws you into the cosmos, making you feel as though you're floating among the stars rather than simply looking at them through a telescope.
The 50mm focal length provides low magnification when paired with most telescopes, making it ideal for:
- Sweeping views of large nebulae like the Orion Nebula, North America Nebula, and Lagoon Nebula
- Capturing entire open star clusters such as the Pleiades, Hyades, and Double Cluster in a single view
- Observing extended galaxy groups and the full extent of large galaxies like Andromeda
- Rich Milky Way star fields and dark nebula regions
- Comet observation where wide fields help track these moving targets
- Locating and centering faint deep-sky objects before switching to higher magnification
The Advantage of 2″ Format
The 2″ (50.8mm) barrel diameter is essential for achieving truly wide fields of view without vignetting. While 1.25″ eyepieces are limited by their smaller barrel, the 2″ format allows the full 60° field to be utilized without cutting off the edges of the view. This is particularly important in longer focal length eyepieces like the 50mm, where the physical size of the light cone would be restricted in smaller barrels.
The 2″ format also provides better mechanical stability and more precise centering of optical elements, contributing to the SuperView's excellent optical performance across the entire field.
Wide-Field Performance Benefits
The 60° apparent field of view represents a sweet spot in eyepiece design - wide enough to provide immersive, panoramic views of the heavens, yet not so extreme that edge performance suffers or eye placement becomes critical. This field width offers several practical advantages:
- Easier object location - The wider field makes it simpler to find and center objects, especially helpful for beginners
- Reduced tracking demands - Objects remain in view longer as Earth rotates, reducing the need for constant manual adjustments on non-motorized mounts
- Context and scale - See deep-sky objects in relation to their surrounding star fields, providing better understanding of their true size and position
- Multiple objects simultaneously - Often capture several related objects in one view, such as galaxy pairs or multiple nebulae in rich regions
- Immersive experience - The wide field creates a more natural, three-dimensional sense of depth when observing star fields
Quality Optical Construction
Like all eyepieces in the Binorum range, the DeepSky SuperView incorporates quality optical glass elements with multi-layer anti-reflection coatings on all air-to-glass surfaces. These coatings maximize light transmission - critical when observing faint deep-sky objects - while minimizing ghosting and internal reflections that could reduce contrast.
The eyepiece barrel features standard safety undercut grooves for secure locking in 2″ focusers and a threaded base to accept standard 2″ filters, expanding your observing capabilities for nebula observation with UHC, OIII, or narrowband filters.
Technical Specifications
- Focal length: 50mm
- Apparent field of view: 60°
- Barrel diameter: 2″ (50.8mm)
- Optical design: 5-element Erfle configuration
- Coatings: Multi-coated on all optical surfaces
- Filter threads: Standard 2″ threads
- Eye relief: Comfortable for extended viewing
- Barrel undercut: Safety groove for secure mounting
Ideal Telescope Pairings
The DeepSky SuperView 50mm performs optimally with telescopes featuring 2″ focusers and delivers best results when used with:
- Short to medium focal ratio refractors (f/5 to f/8) for wide, dramatic views
- Newtonian reflectors of all focal ratios, particularly fast designs (f/4 to f/6)
- Schmidt-Cassegrain and Maksutov-Cassegrain telescopes for lower magnification overview work
- Large Dobsonian telescopes where the combination creates stunning low-power views
With an f/5 telescope, this eyepiece provides approximately 1.25° true field of view - enough to frame large objects comfortably. With faster focal ratios, even wider fields become possible.
Perfect for Multiple Observing Styles
Whether you're a beginner exploring the night sky for the first time, selecting an eyepiece as a thoughtful gift for an astronomy enthusiast, or an experienced observer building a comprehensive eyepiece collection, the DeepSky SuperView 50mm offers exceptional value and performance. Its wide field makes it forgiving for novices learning to navigate the sky, while its optical quality satisfies the demands of experienced observers.
The low magnification provided by the 50mm focal length also makes this eyepiece excellent for observing large, extended objects that won't fit in the field of higher-power eyepieces, giving you the "big picture" view that helps you appreciate the scale and beauty of cosmic structures.
For deep-sky exploration where wide fields reveal the grandeur of the universe, the Binorum DeepSky SuperView 50mm 60° 2″ eyepiece is an essential addition to any serious observer's equipment collection.
