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HOTECH 1.25 Inch Laser Collimator for Newtonian Telescopes

Item# HOTE003
 
4.5

(57 Ratings)

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We searched the world for the best collimator - this is it.

  • Features SCA Self-Centering Adapter
  • This model works in 1.25 inch focusers
  • Available in standard laser or crosshair laser
  • Read the amazing customer reviews! 

Description

HoTech 1.25" SCA Laser Collimator for Newtonian Telescopes.  Unit comes with built-in Selft Centering Adapter and one CR123 battery.

 

The HoTech laser collimator separates itself from all the other laser collimators with its innovative self-centering adapter technology (SCA).  The mechanism allows precise and repeatable installation in all brands of 1.25" and 2" telescope focusers.  All laser collimators in the current market have one fundamental problem - the slop in the adapting mechanism between the laser collimator and the telescope focuser.  This problem is clearly recognized and often discussed among astronomers but so far there is no definite solution in the market yet.

 

No matter how tight the tolerances are machined on the laser collimator or the focuser, a small gap is required to allow installation of the laser collimator.  Once the laser collimator is inserted, the required gap becomes a problem.  The laser collimator is fixed either with one or more thumbscrews or an unified compression ring.  Both methods introduce a very critical issue, namely an off-axis installment that instantly destroys the precision of your collimation instrument along the entire optical axis.

 

The patented HoTech SCA Laser Collimator separates itself from all the other laser collimators with its innovative self-centering adapter technology (SCA).  The mechanism allows precise and repeatable installation in all brands of 1.25" and 2" telescope focusers.  All laser collimators in the current market have one fundamental problem - the slop in the adapting mechanism between the laser collimator and the telescope focuser.  Using the conventional thumbscrew or the unified compressing ring to adapt the laser collimator will definitely shift the optical center to one side. 

 

The Self-Centering Adapter cleverly eliminates the slop by linearly compressing the built-in rubber rings.  By doing this, the diameter of the rings expands to compensate the gap.  Because all rings evenly expand radially in diameter from the compression, this automatically centers the laser collimator in the focuser draw tube.  The SCA adapter accommodates various brands of adapting focusers which have slightly different manufacturing inside diameters so our laser collimator will be precisely centered for each installment.

 

Precision Machined Compact Lightweight Design:

 

The collimator is built from aero-space grade lightweight aluminum and CNC machined with the tightest tolerances.  And it is sand blasted and anodized to protect it from harsh environment.  The lightweight design keeps your telescope balanced without creating additional structural sagging and imbalance during collimation.

 

Includes 45º Faceplate Viewer with Laser Engraved Targeting Grid:

 

The faceplate viewer helps to display the returning laser dot with a clear visual reference during collimation from the rear of the telescope.  It eliminates traveling to the front of your scope repeatedly.  We include it as a standard feature and we laser engrave the targeting grid to ensure long lasting quality display.

 

Finest Projecting Laser Dot:

 

Keeping the laser dot to the finest point is the key to precision collimation.  We limit our laser beam to the finest size to operate in the correct operating distance for optimal visual effect.  There is no guess work involved like other laser collimators which is difficult to center a large projecting laser dot to the center of the faceplate.

 

High Accuracy Laser Alignment:

 

We position the laser precisely in the exact optical path and align the laser beam alone the optical axis.  With the combination of the SCA and the laser alignment technologies, you can quickly collimate your telescope in confidence to achieve perfect collimation every time.

 

Long Lasting Battery Life:

 

By using the CR123, 3V battery as our laser power source, our laser collimator has over 65 hours of continuous use battery life time.  The included CR123, 3V lithium battery operates well under a typical cold night and it has a 10 years shelf life.  This is a great advantage that you don't have to worry about changing the tiny hard to find cell batteries frequently in the dark like other collimators

 

Proprietary Crosshair Laser Collimator Available

 

With our proprietary laser crosshair, user can zero-in the laser with ease during the final collimation on the secondary and the primary mirror.  The crosshair model still exibits a precision laser center dot, but with a touch of four extended laser lines from the center dot. The extension lines (crosshair) of the laser dot is the most intuitive way to guide the laser pointing for an accurate adjustment. During the secondary mirror collimation, a single dot laser projecting on the approximate center of the pre-loaded donut is difficult to identify if the laser dot is exactly on the center.  The crosshair laser can easily help user to adjust the secondary mirror to point the laser on the exact center with the help of the crosshair line. During the final primary mirror collimation, the returning laser dot often hides into the laser exiting hole preventing user to identify if the returning laser is at exact center of the hole.  Again, the crosshair will visually guide the user to center the laser dot with ease even when the center laser dot disappears into the exiting hole.  It is a very effective and essential feature to the SCA Laser Collimator in obtaining at even higher degree of accuracy with ease.


CHOKING HAZARD - small parts may pose a risk to children under 6 yrs.

Shipping Restrictions:
Ships to most international destinations, APOs, and FPOs.

Dimensions & Specifications

Brand

HOTECH

Telescope Accessories Series

Laser Collimator

Options

Model Type: Standard Laser, Crosshair Laser

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The Perfect Accessories

Customer Reviews

REVIEW SNAPSHOT®

by PowerReviews
HOTECH 1.25 Inch Laser Collimator for Newtonian Telescopes
 
4.6

(based on 57 reviews)

Ratings Distribution

  • 5 Stars

     

    (42)

  • 4 Stars

     

    (12)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

96%

of respondents would recommend this to a friend.

Pros

  • Easy to use (48)
  • Strong construction (39)
  • Widely compatible adapter (12)
  • Good padding (11)
  • Great optics (5)

Cons

    Best Uses

    • Astronomy (42)
    • Astrophotography (11)
      • Reviewer Profile:
      • Casual/ recreational (32), Avid adventurer (22)
      • Was this a gift?:
      • No (27), Yes (4)

    Most Liked Positive Review

     

    IT REALLY DOES WORK

    this is a great product. I misaligned my 5in 127 eq newtonian scope to test the hotech claims and this product did great. before reassembling the scope i marked the absolute center as a...Read complete review

    this is a great product. I misaligned my 5in 127 eq newtonian scope to test the hotech claims and this product did great. before reassembling the scope i marked the absolute center as a guide point to aim the laser.re-assembled and the alignment was terrible, just the way i wanted it. upon receiveing the hotech collmination devise i follwed the youtube, [...], instructions and within 10 min max i was in great alginment. so outside i went for the star test and never have i had such a great view jupiter, orion and many other celestial object, thanks HOTECH for a great, simple easy to understand and perform collmination tool. this is one tool every backyard telescope enthusiast should have.

    VS

    Most Liked Negative Review

     

    Not as Self Centering as They Claim

    The concept is great in theory, but the self centering construction doesn't work as claimed. It appears that this is possibly due to a design flaw in the compression rings, which causes each...Read complete review

    The concept is great in theory, but the self centering construction doesn't work as claimed. It appears that this is possibly due to a design flaw in the compression rings, which causes each of the bands to not get the same amount of compression. This leaves either the top or the bottom band not fitting as snug as it should be to prevent movement. I would also recommend not going the extra mile for the Crosshair laser feature. It makes the center point of the laser much larger which makes it harder set up for pin-point accuracy. All this aside, I was able to successfully collimate my optics train with this laser collimator, but not until I made a few modifications to make it fit better. My entire reason for buying this collimator over all others was the claim that it was self-centering, had I known of it's shortcomings in this department I would of most likely opted for a different brand. If you expect things to perform as advertised, you may wish to look elsewhere. If you don't mind doing a few modifications to overcome design issues, then this is the one for you.

    Reviewed by 57 customers

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    (1 of 1 customers found this review helpful)

     
    5.0

    works very well

    By Lyle

    from DOVER,DE

    Verified Buyer

    Pros

    • Easy To Use
    • Nicely Made

    Cons

      Best Uses

        Comments about HOTECH 1.25 Inch Laser Collimator for Newtonian Telescopes:

        A very nice product from amateur astronomer since 1974. Saved a lot of walking! 2 scope collimated in 20 minutes-- one was newly just built and my original 8" scope which has always been a bear to collimate,

        (1 of 1 customers found this review helpful)

         
        4.0

        Good Quality but...

        By Jose

        from SEBRING,FL

        About Me Casual/ Recreational

        Verified Buyer

        Pros

        • Strong Construction

        Cons

        • Adds No Function
        • Not For Bird-jones Telesc

        Best Uses

          Comments about HOTECH 1.25 Inch Laser Collimator for Newtonian Telescopes:

          In the description it does no mention that the HOTECH Laser Collimator does not work for a Newtonian Bird-Jones telescope. So this purchase was useless for me.

          • Was this a gift?:
          • No

          (1 of 1 customers found this review helpful)

           
          5.0

          Thank You!

          By Jason

          from Chittenango,NY

          About Me Casual/ Recreational

          Verified Buyer

          Pros

          • Easy To Use
          • Strong Construction
          • Widely Compatible Adapter

          Cons

            Best Uses

            • Astronomy

            Comments about HOTECH 1.25 Inch Laser Collimator for Newtonian Telescopes:

            Great customer service!

            • Was this a gift?:
            • Yes

            (1 of 1 customers found this review helpful)

             
            5.0

            Great collimator

            By Alexk78

            from San Jose, CA

            About Me Avid Adventurer

            Pros

            • Easy To Use
            • Strong Construction

            Cons

              Best Uses

              • Astronomy

              Comments about HOTECH 1.25 Inch Laser Collimator for Newtonian Telescopes:

              Ordered, got it quickly.

              Have lots of experience with the non-laser collimation tools (astrosystems light-pipe/autocollimator) that do the job but take literally hours to get the scope aligned. With the light-pipe + this laser + barlow i was able to take my new 12'' (from CL) apart, realign the focuser, secondary, primary in under 2 hours (this used to take several evenings with my other dobs)

              the laser is decently collimated (not perfect though, i got the laser moving about 2mm over 25 feet of distance while testing in a v-block). the SCA really gets it centered within the focuser. after initial alignment, using the bawlowed laser method showed that i am almost perfectly collimated, autocollimator agreed as well.

              In short, this one worth every dollar.

              • Was this a gift?:
              • No

              (1 of 1 customers found this review helpful)

               
              4.0

              Worked well

              By Nicholas

              from OMAHA,NE

              Verified Buyer

              Pros

              • Easy To Use

              Cons

                Best Uses

                • Astrophotography

                Comments about HOTECH 1.25 Inch Laser Collimator for Newtonian Telescopes:

                The laser makes this a really effective piece. I set it up and in no time my scope was working like new again

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