Who makes the best apochromatic refractors?
This question is subjective. There are many quality refractors out there: Tele-Vue, Astro-Physics, Carl Zeiss (Jena), Pentax, BORG, Thomas Back Telescopes, etc. Each of these manufacturers has its adherents. We believe that Takahashi makes many of the finest apochromatic refractors available today. Different observers have different applications for their telescopes. While one specific instrument may be better for a certain application, another will be better suited to a different task. Takahashi is currently the only regular manufacturer of fluorite apochromatic refractors above 4″ in diameter. Most optical experts will agree that fluorite is the premier material for low dispersion lens elements if price is not a consideration. One can read the article “The Fluorite Advantage” for a further analysis of this subject. Because Takahashi continues to use fluorite while other manufacturers use ED (Extra-low Dispersion) glass, Takahashis generally have an edge in overall brightness and cont
