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  • 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

EXPLORE SCIENTIFIC Teleextender 5x 31,7mm/1.25"

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
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
observations and astrophotography. The combination of excellent fully multicoating
with superior optical
design makes the Focal Extenders superior to classic Barlow lenses.


  • 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

Technical Data


Extended warranty

10 years


Total length

100 mm

Total width

48 mm

Net weight (without access.)

No return

280 g

Filed under: Eyepieces & Accessories