Best Digital Camera Lens: To fill their needs, manufacturers began to introduce in the 1890s a new kind of finder: a second best digital Camera lens mounted on top of the best digital Camera lens with which the exposure was made. It was fitted with a lens of exactly the same focal length of the taking lens; both were focused together. On the top of the finder-best digital Camera lens was a ground glass the size of the negative. Within was a mirror, fixed at 45° to the lens axis, which reflected the image upwards, like the eighteenth-century best digital Camera lens 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 best digital Camera lens rather than away from it. In backlighted work of this kind, be sure that no sun rays strike into the best digital Camera lens lens. The Kodak Lens 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 lens with a hand or hat, held just beyond the best digital Camera lens'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 lens was at another point in space than the taking lens: by the phenomenon of parallax the images, particularly of subjects close to the best digital Camera lens, were slightly different. This discrepancy was corrected by the introduction of the single-lens reflex best digital Camera lens. The Mirror was now put inside the best digital Camera lens 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 best digital Camera lenss of pictorial photographers for the first two decades of the century.
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Photography
