Imaging Theory
- November 28, 2023 13
Lens adapters have become popular tools for expanding lens compatibility. However, a lingering question persists among many photographers: do lens adapters affect image quality? Let's dive into this topic
- November 28, 2023 13
Relative aperture (or lens speed) is ability of the lens to give more or less bright image on the film at same conditions. Fast lenses with larger relative aperture allows shooting at lower light levels. The aperture balue also affects depth of field.
This article will explain some theory behind the numbers you see on lens scales.
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Focal length is one of main parameters of any lens. This is the distance from the optical center of a lens to the camera sensor when the lens is focused to infinity. It is usually measured in
- November 28, 2023 10
Brightness distribution in the frame area
Brightness of the image produced by a lens is not even - it decreases toward the frame edges. Further from the image center (corresponding to the lens
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Flange Focal Distance (FFD) is the distance from a taking lens mount flange to focal plane, and this distance is the same for any given camera, irrespective of the actual lens focal length since
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Passing through the lens, light is partially reflected from glass surfaces, their faces, and inner parts of the lens housing. Part of the reflected light overlays image as scattered light distributed evenly
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Back focal length (BFL) or Back focal distance (BFD) is the distance from the vertex of the last optical surface of the system to the rear focal point (where light beams parallel to the lens optical axis
- November 28, 2023 5
In the ever-evolving landscape of photography and optics, lens resolution stands as a key determinant of image quality. From capturing intricate details to delivering crystal-clear visuals, understanding
- November 28, 2023 7
In the world of optics, the concept of lens light transmission plays a pivotal role in determining the performance and quality of camera lenses, binoculars, telescopes, and various optical devices. Understanding