Farpoint 650nm Laser Collimator — 1.25" Barrel

Product Overview

The Farpoint 650 nm Laser Collimator with a 1.25″ barrel covers the first step of Newtonian collimation: aligning the secondary mirror, then checking the primary quickly. It is built for Newtonian and Dobsonian reflectors with standard 1.25″ focuser drawtubes.

Every body is machined from a single piece of aluminum in one machining step, so the barrel and the laser axis stay concentric. An eight-screw alignment system locks both ends of the 650 nm diode with two sets of directly opposing screws. Farpoint machines the tool in the USA and backs it with a lifetime alignment guarantee. A mirror centre-marking template, triangle centre spots and a carrying case are supplied.

Who It's For

This is a good match if your reflector has a 1.25″ focuser — common on smaller Newtonians, tabletop Dobsonians and many imported reflectors — and you want collimation to be a short check rather than a project. It suits visual observing, where alignment gets confirmed at the eyepiece before the first target, and imaging, where the focuser axis is worth squaring before a run of long exposures. If your reflector has a 2″ focuser, or you own one of each, Farpoint's 1.25″/2″ combo-barrel model covers both in one tool.

Key Features & Design

• 0.76 mm (30/1000″) beam aperture: the smallest aperture Farpoint publishes for any collimator on the amateur astronomy market, giving less speckling and a tighter return spot to read against the centre mark.
• Eight-screw alignment system: two sets of directly opposing screws hold both ends of the laser diode, rather than the three-screw arrangement used in cheaper designs.
• Single-piece machined body: barrel and diode housing cut from one aluminum blank in a single machining step, which keeps them concentric.
• 1.25″ stepped barrel: seats in standard 1.25″ focuser drawtubes.
• Extra-bright 650 nm red laser: readable at the focuser and on the primary in all conditions.
• Protected switch: positive action, shielded by an aluminum ring against accidental activation.
• Red anodized aluminum body: rugged, and chosen for visibility of the return beam's position.
• Lifetime alignment guarantee: Farpoint warrants the laser's alignment for the life of the tool.

Mechanical and Optical Design

A laser collimator's accuracy comes down to one relationship: the angle between the beam and the barrel that holds it. Where the two disagree, every adjustment the tool indicates is wrong by that angle, and nothing in the tool's behaviour reveals it. Farpoint constrains this at both ends. Machining the barrel and the diode housing from one piece of aluminum in a single step removes the tolerance stack that comes with a barrel pressed or threaded into a separate body. The eight-screw mount then clamps the diode at both ends with directly opposing pairs, holding it in compression rather than against a spring or a single face, which is what keeps alignment through handling and transport.

The 0.76 mm aperture addresses the reading rather than the alignment. Laser light scattered from a mirror produces speckle, and a wide beam returns a large, noisy patch that is hard to centre against a mark. Narrowing the aperture to 0.76 mm tightens the returned spot, so a small residual error stays visible.

Recommended Uses

• Secondary mirror alignment: the main task. The beam shows at once whether the secondary sits centred under the focuser and at the right tilt.
• Quick primary check: brings the primary approximately into place before a Cheshire refines it.
• Dark-site checks: the return reads by its own light, so a mid-session check costs no dark adaptation.
• After transport: a tabletop Dobsonian or a Newtonian just out of a car reads in seconds before the first target.
• Before an imaging run: misalignment shows up in the corners of a long exposure as coma and elongated stars.

Compatibility and Accessory Notes

• Focuser fit: 1.25″ stepped barrel, for standard 1.25″ focuser drawtubes.
• 2″ focusers: this barrel seats in 1.25″ drawtubes only. Farpoint's 1.25″/2″ combo-barrel collimator covers both sizes, and we stock it.
• Telescope types: Newtonian and Dobsonian reflectors. Refractors, catadioptric and SCT designs collimate by other means.
• Primary mirror centre mark: the laser aligns to a mark on the primary. The supplied acetate template and triangle centre spots cover mirrors up to 12.5″.
• Mirrors over 12.5″: the Farpoint LARGE centre-marking template covers 12″ to 26″ and is sold separately.
• Pairs with a Cheshire: the Farpoint 1.25″ Collimation Kit bundles this laser with a matching 1.25″ Cheshire, the centre-marking template and a fitted case.
• Tell us your scope and we will confirm the fit.

Good to Know Before You Order

• It is built for reflectors. Farpoint designs this collimator for Newtonian and Dobsonian optics. For a refractor, SCT or Maksutov, tell us what you have and we will point you at the right tool.
• This is the 1.25″ barrel version. A 2″ drawtube takes the combo-barrel model instead, which steps to fit either size.
• The primary mirror needs a centre mark for the laser to align to. The template and triangle spots are in the box, and marking a mirror is a one-time job that lasts the life of the coating.
• The supplied template covers mirrors up to 12.5″. Larger mirrors take the LARGE template, which we also stock.
• A laser brings the primary close and a Cheshire finishes it. For visual work the laser alone is generally enough; for imaging, the two together read more precisely.
• The 650 nm beam is bright by design. It is meant to be read off the mirror and off the focuser face rather than viewed directly.

Frequently Asked Questions

Is it difficult to set up?

No. It drops into the focuser like an eyepiece and switches on. The one preparatory step is marking the centre of the primary mirror, and the template and spots for that are supplied — done once, the mark lasts the life of the mirror.

Will it fit my telescope?

If your reflector has a 1.25″ focuser drawtube, yes. A 2″ drawtube takes the combo-barrel version, which steps to fit either. Send us the make and model and we will check which one suits.

What does the 0.76 mm beam aperture change in practice?

It tightens the spot that returns off the mirror. A wider beam comes back as a larger, speckled patch that is harder to judge against the centre mark; at 0.76 mm the return is a small spot, so a slight misalignment stays visible.

Do I need a Cheshire as well?

For a check before visual observing, the laser on its own does the job. For the last of the primary alignment — and for imaging, where the frame corners show every error — a Cheshire reads more precisely. Farpoint's 1.25″ Collimation Kit pairs this laser with one.

What separates it from an inexpensive laser collimator?

The single-piece machined body, the eight-screw diode mount holding both ends, and the 0.76 mm aperture. Each exists to keep the beam true to the barrel and the return spot readable, and Farpoint backs the result with a lifetime alignment guarantee.

Can it be used on an SCT or a refractor?

Those designs collimate by other methods, so this tool has no role there. Tell us what you have and we will point you at the right one.

Bottom Line

In short: a USA-made 650 nm laser collimator with a 1.25″ barrel, a single-piece machined body, an eight-screw diode mount and a 0.76 mm beam aperture, for Newtonian and Dobsonian reflectors with 1.25″ focusers. The centre-marking template is supplied, and it pairs with a Cheshire when you want the primary finished precisely.