This means the optical collimation is set at the factory and does not change for the life of the instrument. To achieve this, all optics are accurately centered, including the mirror backs. SL300 computer controlled turning center. The finished mirror cell with its ventilation cutouts weighs a mere 2 lb. The other 28 lb.
Similar care is taken with the corrector cell and other mounting components.
The result is a telescope which you can count on to produce consistently excellent images any time, any place. You will appreciate the unique design and fine craftsmanship of this telescope. Astro-Physics chose to employ a moving mirror focuser design in order to best accommodate a wide variety of photographic and visual accessories. The goal was to achieve precise movement of the mirror down to the micron level with absolutely no image shift. With this system, your image will stay on that tiny CCD chip regardless of focuser position.