By Michael Langford, Anna Fox, Richard Sawdon Smith, Peter Renn, Christian Nolle, Mark Bolland
Nice e-book for a uncomplicated images classification. I had this for one path and it in nice situation. good deal.
Read Online or Download Langford's Basic Photography: The Guide for Serious Photographers, Eighth Edition PDF
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Extra info for Langford's Basic Photography: The Guide for Serious Photographers, Eighth Edition
In front of it to receive the image. You are literally inside a camera. Move the tracing paper back and forth to see how the image is captured. 12 Top: A sheet of paper just held up towards an illuminated subject receives a jumble of uncontrolled light rays, reflected from all its parts. Bottom: A pinhole in an opaque screen restricts rays from each part of the subject to a different area of the paper, forming a crude upside-down image You can easily take colour photographs using a pinhole if your camera has a removable lens.
Light from a large-area source (including hard light diffused) gives a much softer edge to shadows. ■ An opaque material absorbs some of the light striking it and reflects the rest. ■ Smooth, shiny surfaces give specular reflection – direct light is largely reflected all one way. Oblique illumination bounces off such a surface at an angle matching the light received. Matt surfaces scatter reflected light more evenly in all directions. ■ Transparent materials directly transmit light; translucent materials diffuse it.
And most light reaching the boundary at a very low angle (very oblique) is reflected back off the surface. The whole picture Everything we see in the world around us appears the way it does because of the mixture of effects it has on light – diffuse and specular reflection, some absorption, often transmission and refraction too. An apple side-lit by direct sunlight for example reflects coloured wavelengths strongly from its illuminated half. Most of this is diffusely reflected, but part of its smooth skin reflects a bright specular highlight, just where the angle of the sun to the surface matches the angle from this point to your eye.