Farpoint Primary Mirror Center Marking Kit - LARGE

The Farpoint Primary Mirror Center Marking Kit with LARGE template — designed for big Newtonian and Dobsonian primary mirrors from 12" to 26" diameter. Everything you need to accurately mark the center of your large primary mirror for precise collimation.

Why Center Marking Matters

Accurate collimation depends on knowing exactly where the center of your primary mirror is. Without a proper center mark, your laser collimator and Cheshire eyepiece have no reference point — you're guessing instead of aligning. On large mirrors, even small centering errors are amplified, making a precise center mark even more critical.

What's in the Kit

• Large acetate center-marking template — precision-cut for primary mirrors from 12" to 26" diameter
• 8 triangle center-mark targets — the triangle edges touch the outside of the illuminated field when viewed through a Cheshire, removing the guesswork of centering a traditional round dot

Which Size Do You Need?

• Standard template — accommodates primary mirrors up to 12.5" diameter (see standard kit)
• Large template (this kit) — accommodates primary mirrors from 12" to 26" diameter

Complete Your Collimation Toolkit

A center mark is just the starting point. For the complete collimation workflow, pair your center mark with a Farpoint laser collimator and Cheshire eyepiece:

• Laser Collimators — the essential first step for secondary alignment and rough primary alignment
• Cheshire Eyepieces — the critical second step for final, precise primary alignment
• Collimation Kits — laser + Cheshire + standard center-marking kit bundled together

📖 Read our complete Telescope Collimation Guide →

For Newtonian and Dobsonian reflecting telescopes only. Not intended for refractors, catadioptric, or SCT designs.