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Telescope accessories > Alignment accessories > Laser pointers > Baader > Baader Planetarium laser colli (collimation device for Newtonian and SC telescopes)
( 4.33 / 5 )
Product no.: 18919

Planetarium laser colli (collimation device for Newtonian and SC telescopes)

$ 104.00 incl. VAT plus shipping costs
short-term
ready for shipping in 1-2 weeks + lead time

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Product description

Colli is an abbreviation of collimation. In its broadest sense, the word means adjusting or aligning.

Newtonian reflecting telescopes are usually considered susceptible to de-collimation. And that is true - at least if they are sometimes transported to dark observing sites in the boot of a car. If you are that type of observer, then you should have a Laser Colli™ included in your basic astronomy equipment. With some practice and a little preparation, in just a minute or two the telescope can be once again perfectly collimated.

The technique employed to ensure that a reflecting telescope is properly collimated is, with the Colli inserted in the focuser, to adjust the laser beam so that it reflects back along itself. Of course for the Laser Colli to function accurately here, the laser beam must be exactly centred in its housing to start with. The laser is co-axially adjustable at 6 points within its housing (this adjustment has already been done by us in-house). Six small screws are used for this, so please do not adjust these - the laser will immediately become tilted in its housing and collimation is then impossible.

What distinguishes the - specially manufactured for Baader Planetarium - laser adjuster compared to the various competitors? The really clever thing here is its special etched reference plate which no other laser collimator available on the market has. Firstly, it is used to make the reflected laser light beam more easily visible - a simple glass plate here would make the point of laser light much more difficult to see. Secondly, in the case where the telescope is badly de-collimated (so the laser beam is not even reflected back onto the plate), it allows you to look through the plate into the focuser tube itself to see roughly in what direction the beam has been reflected. A grazing reflection will be visible somewhere inside the focuser tube.

Additional advantages of our Laser Colli:


  • all-metal design
  • extremely accurate 1.25" barrel
  • laser beam exits through a 0.8mm aperture, making it also suitable for collimating SC telescopes

ATTENTION LASER!

Never look directly into the laser beam. Protect your eyes. Store the laser-Colli™ so that it is not accessible to inexperienced adults or children. Bear in mind that, in a badly de-collimated telescope, the laser beam could be deflected out of the tube.


Specifications

Capacity


Connection (to the telescope)
1,25"

General


Weight (g)
152
Colour
black
Type
Alignment accessories
Type of build
Laser pointers
Baader Planetarium laser colli (collimation device for Newtonian and SC telescopes)

The white point-shaped marker (reference point for adjustment) should be in line with the clamping screw on the focuser.

Baader Planetarium laser colli (collimation device for Newtonian and SC telescopes)

Collimation always begins with checking and setting the secondary mirror. For this, it is a big advantage if the centre of the primary mirror has been marked.

Baader Planetarium laser colli (collimation device for Newtonian and SC telescopes)

When you can see an image on the cross-mark etched reference plate, keep adjusting the primary mirror until the reflected beam falls through the central hole and is reflected back on itself.

Customer reviews

Super colimator

Review by J. M. on 18.02.2022 17:31:51

( 5 / 5 )

I consider the Baader Planetarium laser colli Mark III to be one of the best if not the best collimator on the market. Collimation with it is easy, fast and most importantly accurate. I highly recommend it.

Good tool for reflectors

Review by E. S. on 03.02.2023 09:55:51

( 4 / 5 )

I bought and loved this little piece of equipment. Make sure to note the clamping dot. The only downside is that the target is a hole and is a little bit difficult to center the laser in the hole itself. Despite that I found my methods to work with it and is important and simple tool so i can double check my collimation before each imaging session.

Simple and effective

Review by tfro71 on 01.03.2021 17:53:43

( 4 / 5 )

Used this to collimate my newton first time ever. Works simple and quick.

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