Reducing this flaw requires turning to premium apochromatic
refractors, which employ exotic and expensive glass.
9 Gray $4,750 "Spotting scope"-size Porro-prism,45-degree eyepieces, apochromatic
glass, waterproof Midsize * Magnification & Field of View Company Model Objective (mm) (ft.
lenses correct chromatic aberration for three wavelengths of light, often used in super-telephoto lenses.
The unit in question is the 102-mm model from their new line of premium apochromatic
refractors that all feature a triplet lens with an element made of the new Hoya FCD100 glass.
2) High-resolution, apochromatic
corrected, optimized for multiphoton microscopy water immersion objective:
For instance, one might put an apochromatic
refractor onto a heavyweight equatorial mount for astrophotography but use the same scope on a lightweight altazimuth mount for airplane travel.
Alternatively, exotic substances such as fluorite may be substituted for one or more of the lens elements, resulting in an apochromatic
The Stellarvue SVA-130T triplet apochromatic
refractor is a premium refractor built to last a lifetime--and then some.
The confocal microscope used in apochromatic
cryogenic lens is offered exclusively by the attocube systems AG.
The expense of completing my master's degree forced me to sell most of them, but I think I've come up with the perfect urban telescope: a 3-inch apochromatic
(highly color-corrected) refractor on an altazimuth mount (one that simply moves up and down and side to side) with slow-motion controls and a simple sighting device.
The light next goes "backward" through a Meade 152ED f/9 apochromatic
refractor, which acts like a 1,368-mm eyepiece and recollimates the beam.