With teleextenders it is possible to extend the effective focal length of a telescope system, resulting in higher magnification for the observation of the moon, the planets or small Deep-Sky objects with the same eyepieces. So you can use the advantages of eyepieces with longer focal length - such as the bigger eye distance and the more relaxed observing comfort - at high magnifications also.
These teleextenders incorporate a telecentric optical design that deliveres a excellent image sharpness over the whole field of view and are premium choices for visual observations and astrophotography. The combination of excellent fully multicoating with superior optical design makes the Focal Extenders superior to classic Barlow lenses.
 
Features
Suitable for visual observations and astrophotography
Extending the effective total focal length of the telescope by a factor of 5x
Four lens telecentric design
Fully multicoated
Filter thread for color or nebula filters
 
Scope of Delivery
Focal Extender 5x
 
Highlights
Four-lens telecentric teleextender 5x
Multiplying the effective focal length by: 5x
Fully multicoated design with four lenses
Telecentric optical design for excellent sharpness
All lens edges blackened for maximum contrast
Eyepiece and teleextender barrel size: 1.25"
Filter thread for color or nebula filters