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With a calibration laser, also called a collimation laser, the primary and secondary mirror of a Newtonian telescope can be correctly aligned. The use of such a laser is a simple and fast method, which also allows a high degree of accuracy.
The prerequisite is that both mirrors are adjustable. However, this is practically always the case with larger Newtonian telescopes with an aperture of 150 millimetres or more.

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Omegon Newton adjusting laser 1,25'' (inspection window)
Omegon
Newton adjusting laser 1,25'' (inspection window)
( 3.67 / 5 )
$ 59.00
ready for shipping in 24 h
Hotech Reflexionsspiegel 2" für Advanced CT Laser-Kollimator
Hotech
Reflexionsspiegel 2" für Advanced CT Laser-Kollimator
$ 205.00
ready for shipping in 24 h
Howie Glatter Laser pointers 635nm 1,25"
Howie Glatter
Laser pointers 635nm 1,25"
$ 357.00
ready for shipping in 24 h
Howie Glatter Laser pointers 650nm 1,25"
Howie Glatter
Laser pointers 650nm 1,25"
$ 433.00
ready for shipping in 24 h
Bresser Laser pointers 1.25"
Bresser
Laser pointers 1.25"
( 4 / 5 )
$ 82.00
ready for shipping in 1-2 weeks
Skywatcher Laser pointers 1mW Red 1.25"
Skywatcher
Laser pointers 1mW Red 1.25"
$ 82.00
Product can be shipped as of 15.03.2024
Baader Planetarium laser colli (collimation device for Newtonian and SC telescopes)
Baader
Planetarium laser colli (collimation device for Newtonian and SC telescopes)
( 4.33 / 5 )
$ 107.00
Product can be shipped as of 20.03.2024
Hotech 1.25"/2" SCA laser collimator - dot laser
Hotech
1.25"/2" SCA laser collimator - dot laser
Our price:
RRP:  $ 238.00
$ 217.00
ready for shipping in 6-10 weeks
Hotech 1.25" SCA laser collimator - crosshair laser
Hotech
1.25" SCA laser collimator - crosshair laser
Our price:
RRP:  $ 249.00
$ 173.00
ready for shipping in 6-10 weeks
Hotech 1.25" SCA laser collimator - dot laser
Hotech
1.25" SCA laser collimator - dot laser
Our price:
RRP:  $ 216.00
$ 173.00
ready for shipping in 6-10 weeks
Hotech 2" SCA laser collimator - crosshair laser
Hotech
2" SCA laser collimator - crosshair laser
Our price:
RRP:  $ 303.00
$ 239.00
ready for shipping in 6-10 weeks
Howie Glatter Laser pointers 635nm 2"
Howie Glatter
Laser pointers 635nm 2"
$ 590.00
ready for shipping in 3-6 months
Hotech HyperStar Laser Kollimator 14"
Hotech
HyperStar Laser Kollimator 14"
$ 980.00
ready for shipping in 6-10 weeks
Hotech Advanced CT laser collimator for 2" focuser with fine adjustment
Hotech
Advanced CT laser collimator for 2" focuser with fine adjustment
Our price:
RRP:  $ 880.00
$ 700.00
ready for shipping in 6-10 weeks
Howie Glatter Laser pointers 650nm 2"
Howie Glatter
Laser pointers 650nm 2"
$ 650.00
ready for shipping in 3-6 months
Hotech Advanced CT laser collimator for 1.25" focuser with fine adjustment
Hotech
Advanced CT laser collimator for 1.25" focuser with fine adjustment
Our price:
RRP:  $ 930.00
$ 700.00
ready for shipping in 6-10 weeks
Hotech HyperStar Laser Kollimator 9.25" / 11"
Hotech
HyperStar Laser Kollimator 9.25" / 11"
Our price:
RRP:  $ 1,040.00
$ 740.00
ready for shipping in 6-10 weeks
Howie Glatter Laser pointers 532nm 1.25" & 2"
Howie Glatter
Laser pointers 532nm 1.25" & 2"
$ 1,060.00
ready for shipping in 3-6 months
Officina Stellare Laser pointers Collimation Kit De Luxe
Officina Stellare
Laser pointers Collimation Kit De Luxe
$ 1,390.00
ready for shipping in 3-5 weeks
Hotech Laser pointers Hyperstar 8" Upgrade Kit
Hotech
Laser pointers Hyperstar 8" Upgrade Kit
Our price:
RRP:  $ 238.00
$ 156.00
ready for shipping in 6-10 weeks
Starlight Instruments Laser pointers UNI-Blug 2"
Starlight Instruments
Laser pointers UNI-Blug 2"
$ 189.00
ready for shipping in 3-6 months
Howie Glatter Laser pointers 650nm 1.25" & 2"
Howie Glatter
Laser pointers 650nm 1.25" & 2"
$ 720.00
ready for shipping in 24 h
Hotech HyperStar Laser Kollimator 8"
Hotech
HyperStar Laser Kollimator 8"
Our price:
RRP:  $ 940.00
$ 690.00
ready for shipping in 6-10 weeks