Aberrations of long focus anastigmatic photographic objectives
Book details
- Title
- Aberrations of long focus anastigmatic photographic objectives
- Publication year listed
- 1924
- Format
- Public domain eBook
- Reading access
- Free online reader; no registration required
- Source record
- View on Archive.org
About this book
Aberrations of long focus anastigmatic photographic objectives
Year: 1924
No lens system gives perfect definition because of the inherent aberrations of spherical refracting surfaces. The aberrations of a centred lens system are denned, and the characteristic manner in which each aberration affects the image is discussed. Methods for the determination of the various aberrations of a photographic objective are described. The Hartmann method, for which a special camera was designed, was used for the measurement of spherical aberration and departure from the sine condition, while a lens-bench method was employed in the measurement of curvature of field, astigmatism, distortion, and lateral and axial chromatism. The aberrations of thirty-three photographic objectives of the anastigmatic type, made by different manufacturers, are presented graphically. The var
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