| The 'Barlow lens', a modification of this telescope lens, is a negative achromatic combination of flint glass and crown glass. |
| The objectives are adopted by poly-membrane achromatic lenses and collocated with widefield eyepieces. |
| This behavior is also common in two-material waveplates such as achromatic waveplates constructed from quartz and magnesium fluoride plates. |
| The apochromatic lens, therefore, corrects for chromatic aberration to a greater degree than does an achromatic lens. |
| The superior achromatic lenses will show you color and details you have never seen before in both your antique and self-made stereo views. |
| This stark and achromatic poem is a world away from the graceful and well-tuned lyrics with which Campbell began his career. |
