Unlock higher magnifications with your existing telescope eyepieces using the Explore Scientific 3× Teleextender, a premium telecentric focal extender designed for high-resolution visual observing and astrophotography. By increasing your telescope's effective focal length by a factor of three, it allows you to explore finer details of the Moon, planets and compact deep-sky objects without needing to replace your existing eyepieces.
Telecentric Optical Design
Unlike conventional Barlow lenses, the Explore Scientific Teleextender uses a sophisticated four-element telecentric optical design. This helps maintain a consistent 3× magnification factor regardless of normal changes in eyepiece or camera spacing, while delivering sharp images across the field of view. It is an excellent choice for observers seeking predictable high-magnification performance. <Cite refs={["turn990175search0","turn990175search2"]}/>
Premium Multi-Coated Optics
The four-element optical system features fully multi-coated optics to maximise light transmission and support accurate colour rendition. Blackened lens edges help suppress stray light and internal reflections, enhancing contrast and producing clean, well-defined images. <Cite refs={["turn990175search2","turn990175search4"]}/>
Preserve Eye Relief at High Magnifications
High-power eyepieces often have shorter eye relief, which can make extended observing sessions less comfortable. The Teleextender allows you to increase magnification while retaining the eye-relief characteristics of your existing eyepiece. This is particularly beneficial for observers who wear glasses and those who prefer the comfortable viewing position of longer-focal-length eyepieces. <Cite refs={["turn990175search0","turn990175search1"]}/>
Versatile for Visual Observing and Astrophotography
The 3× Teleextender is well suited to detailed lunar and planetary observation, close double-star viewing and planetary imaging. It expands the capabilities of your existing eyepiece collection, effectively providing additional magnification options without requiring separate eyepieces for every observing requirement.
For example, a 12mm eyepiece used with this extender behaves approximately like a 4mm eyepiece in terms of magnification, while retaining the original eyepiece's eye relief characteristics.
Key Features
Magnification factor: 3×
Optical design: Four-element telecentric system
Optical coatings: Fully multi-coated optics
Stray-light control: Blackened lens edges
Barrel diameter: 1.25 inches (31.7mm)
Length: Approximately 93mm
Width: Approximately 45mm
Weight: Approximately 249g
Applications: Visual astronomy and astrophotography
Ideal For
High-resolution lunar and planetary observation
Increasing the magnification of existing eyepieces
Planetary astrophotography
Observers seeking comfortable eye relief at high magnifications
Astronomers looking for a premium alternative to a conventional Barlow lens
The Explore Scientific 3× Teleextender is a versatile addition to a serious observer's accessory collection, combining a telecentric optical design, contrast-enhancing coatings and consistent magnification in a robust 1.25-inch format.
Note: Actual observing performance depends on telescope aperture, optical quality, collimation and atmospheric seeing. A 3× extender may produce excessive magnification under poor seeing conditions or with certain telescope and eyepiece combinations.