58mm Lens For Camera: To fill their needs, manufacturers began to introduce in the 1890s a new kind of finder: a second Camera mounted on top of the Camera with which the exposure was made. It was fitted with a 58mm lens for Camera of exactly the same focal length of the taking 58mm lens for camera; both were focused together. On the top of the finder-camera was a ground glass the size of the negative. Within was a mirror, fixed at 45° to the 58mm lens for Camera axis, which reflected the image upwards, like the eighteenth-century Camera obscura. A collapsible hood shaded the ground glass so that the image could be seen clearly.
Attractive shots may also be made from a position where the shadows fall toward your Camera rather than away from it. In backlighted work of this kind, be sure that no sun rays strike into the Camera 58mm lens for camera. The Kodak 58mm lens for Camera Hood, previously mentioned, provides a reliable safeguard when the sun's rays are from the side, but you'll need extra precautions when you aim more closely into the light. Shield the 58mm lens for Camera with a hand or hat, held just beyond the camera's angle of view. In such work, give a bit more exposure than would be needed if the sun were directly on the front of the subject.
But in fact the picture was not a duplicate, for the viewing 58mm lens for Camera was at another point in space than the taking 58mm lens for camera: by the phenomenon of parallax the images, particularly of subjects close to the camera, were slightly different. This discrepancy was corrected by the introduction of the single-58mm lens for Camera reflex camera. The Mirror was now put inside the Camera body. By an ingenious spring-loaded mechanism it flipped from its 45 ° position to the horizontal on pressing the shutter release. The American Graflex (introduced in 1903) and the British Soho Reflex of three years later became the standard hand cameras of pictorial photographers for the first two decades of the century.
|
|
Photography
