Chromatic aberration
How to deal with the fact that each color focuses on a different plane? Understand what it is and the strategies to reduce but also use spherical aberration as an aesthetic resource.
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Spherical aberration
The secret of soft focus lenses, spherical aberration, is an insurmountable barrier in the quest for sharpness in photographic images.
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Circle of Confusion
A key concept for understanding the quality of photographic images and what makes lenses’ images less, maybe more, than mere copies of reality.
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What is resolution in photography
Resolution in photography refers to the ability to record detail. It concerns the film or digital sensor used, but also the optics and our eyes, as the end point of all images.
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Refraction, Dispersion and Optical Glass for photographic lenses
Refraction, Dispersion and Optical Glass for photographic lenses Refraction is a phenomenon of waves changing direction when passing from one medium to another. In a photographic lens that is the case when passing from air to glass and again from glass to air. It occurs also when passing from one type of glass to a different one. They…
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Focal length and image circle
A photographic lens’ focal length has no direct relationship to the angle of view, or determining whether it is a wide-angle or telephoto lens. Read this article and understand what focal length, angle of view and image circle really are.
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What is a photographic lens?
What is a photographic lens? Any scene you can shoot is made up of objects that emit light (own or reflected) and it is from this light that the lens will form an image to be recorded on film or digital sensor. If it were possible to block almost all light coming from a scene,…
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Light and colors, physics and perception
Light and colors, physics and perception Yes, light is a wave, and then … Wave, is a phenomenon in which there is energy transmission without transport of matter. It’s like energy traveling in space. It is easier to understand if we think of an example where there is matter transporting energy. For example, to drop a…
