The specifications of a telescope are NOT the only specs that matter. The other half of the equation is the specifications of the eyepiece. Telescope eyepieces are made in different models and sizes to accommodate different observing methods and celestial objects. For example, understanding the focal length of your optical tube divided by the focal length of your eyepiece will result in magnification, which in return can tell you whether it is more suitable for deep space low surface brightness observation or planetary/terrestrial high surface brightness observation. For example, if you wanted to observe an object such as the Andromeda Galaxy with a large apparent diameter, an eyepiece with a long focal length and large apparent field of view would excel over an eyepiece with a shorter focal length and small apparent field of view because it would be able to accommodate the size of the object at low magnification and high FOV while not getting dimmer images as you would with short focal lengths. If you plan on observing planets, a short focal length eyepiece with a small FOV will result in high magnification to observe details on the surface (eg. Great Red Spot). You'll get a dimmer image, but since planets are already bright as it is, this won't be an issue. - Note: Almost all eyepieces come in 2" or 1.25" barrel size forms.
The Representing the ultimate in eyepiece design and technology, the new six and seven element Series 5000 Ultra Wide Angle eyepieces deliver extremely high resolution, contrast and full-field sharpness over an astounding 82° apparent field-of-view. Only the highest quality materials were selected to create these extraordinary eyepieces. The designs required several different types of exotic glass in order to achieve the highest level of optical performance. Looking through a Series 5000 Ultra Wide Angle eyepiece is the next best thing to actually being there.... Learn MoreFREE SHIPPINGModel#: 07662(48 States)
Only the highest quality materials were selected to create this amazing eyepiece value, offering an unparalleled vista on the Universe. All series 5000 UWA eyepieces feature a 7-element, fully multi-coated optical design with premium-grade and exotic optical glasses for the best possible performance and image brightness, blackened lens edges and internal surfaces for enhanced contrast, and a parafocal design for little or no focus change when switching between eyepieces of the series.... Learn MoreFREE SHIPPINGModel#: 07663(48 States)