The American annual of photography . ^ and 4x5 plates, or shutter ranging from time and bulb, to i and 1/300 secondwould be preferable; a shutter having i/ioo second for itsutmost speed will frequently not arrest motion in running,leaping and diving instances. A double triple convertible lens, of which each single com-ponent renders a different size image, admits of three sizes ofimages to be taken; adding an auxiliary lens to cap over thedoublet, selecting one that will decrease the focal length of thelatter, adjusts this camera for taking four sizes of images, viz.,doublet, single
The American annual of photography . ^ and 4x5 plates, or shutter ranging from time and bulb, to i and 1/300 secondwould be preferable; a shutter having i/ioo second for itsutmost speed will frequently not arrest motion in running,leaping and diving instances. A double triple convertible lens, of which each single com-ponent renders a different size image, admits of three sizes ofimages to be taken; adding an auxiliary lens to cap over thedoublet, selecting one that will decrease the focal length of thelatter, adjusts this camera for taking four sizes of images, viz.,doublet, single front, single rear, and the auxiliary placed overthe doublet. A scale for the first three focal lengths is at- 224. t CHERRY LANE. G. W. Harting. tached on the shutter, while the auxiHary requires a slight de-crease of exposure over the doublet, which can quickly beascertained after a few exposures with it. The latter is veryadvantageous to use in copying photographs, permitting themto be copied larger than the original, also small objects andarticles placed within close range of the lens. The shutter with lens-board attached is often removable,and can be placed with front to inside of camera, allowing thelatter to be ensconced in the focusing cloth a plate holder oneach side within, and tied with a string to form a neat packet,over which is placed a shawl strap with handle attached. To use camera in hand.—A focus scale must be can be made for the three focal lengths of lenses by firmlyattaching a strip of good paper to the bottom, or track of cam-era. With indelible, or drawing ink, mark an arrow on the mostprominent movable part above the strip; with arrow pointingdirect to figure
Size: 1382px × 1808px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1919
