About the Hotech 1.25" SCA Laser Collimator...
The Hotech 1.25" SCA Laser Crosshair Collimator is the ideal precision instrument to collimate your Newtonian and SCT telescope. Unit comes with one patented 1.25" SCA Laser Collimator w/ built-in Self-Centering Adapter, one CR123 battery, and users manuals for Newtonian, SCT, and Star collimation. This product provides an illuminated crosshair pattern from the laser.
The Hotech 1.25" SCA Collimator separates itself from all other laser collimators with its innovative self-centering adapter technology (SCA). This 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, 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 has been no definite solution in the market.
No matter how tightly the tolerances 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. A laser collimator is secured with one or more thumbscrews or 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 Hotech 1.25" SCA Collimator 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.
In summary, the Hotech 1.25" SCA Collimator serves three critical functions. First, its expansion rings accommodate almost all focuser'''s manufacturing tolerances. Second, it automatically centers the adapting laser. Third, it provides at least two evenly distributed circular contacts on the focuser'''s inner tube surface preventing the adapting laser from pivoting. Once the slop factor is taken away, you can quickly collimate your telescope in confidence to achieve perfect collimation every time.
Hotech 1.25" SCA Laser Collimator Features...
- Designed to fit 1.25" focusers; it provides a crosshair image pattern
- This is ideal to collimate your Newtonian and SCT telescope
- Includes 45 Degree Faceplate Viewer w/ Laser Engraved Targeting Grid and Fine Projecting Laser Crosshair
- Accommodates various brands of adapting focusers which have slightly different manufacturing inside diameters
- Uses aero-space grade lightweight aluminum material and CNC machined with the tightest tolerances, then sand blasted and anodized to protect from harsh environment
- One CR123 battery included
Hotech 1.25" SCA Laser Collimator Specifications...
Equipment Type: Laser Collimator, Crosshair image
Barrel Size: 1.25"
Laser Wavelength: 650nm
Laser Output Power: Class II,
Operating Voltage: 3V
Battery: One 3V Lithium Battery (included), 10 yrs shelf life, 40+ Operating Hours
Weight: 6.5 oz. w/ battery
Dimension: 2"/50.8mm dia. x 6.25"/159mm (L)
Construction: All Areo-Space Grade Anodize Aluminum CaseHotech Corporation Product Number: SCA-1.25C