![]() One of the most frequently called-out optical anomalies, and one of the main reasons new lens development continues to occur, chromatic aberration describes the way a lens is unable to focus various wavelengths of color at the same point. Aberrations are divided into two categories: chromatic and monochromatic-which are then further subdivided into specific types of each aberration. In regard to optics, this describes the failure of rays of light passing through a lens to converge at a single point. ![]() In its most basic definition, an aberration is something that deviates from the norm, usually in an unwanted way. But what exactly does an anomalous partial dispersion element do? And why do you not want spherical aberration? This glossary of terms and explanations should help to sort out some of the linguistic and conceptual hurdles faced when learning about a new lens. Scientific-sounding words like aspherical elements, chromatic aberration, coma, low dispersion, and high refractive index to the layman often lead to imprecise thoughts regarding how a lens performs or what it does to better image quality. ![]() If you spend much time perusing the Lenses section of the B&H website, or follow along with the latest announcements of new glass, you're likely to run into a range of phrases that are not inherently known to those with less than a keen, honed understanding of photographic and optical geekery. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |