This section is from the book "Complete Self-Instructing Library Of Practical Photography", by J. B. Schriever. Also available from Amazon: Complete Self-Instructing Library Of Practical Photography.
Extra Rapid Universal Lens. This lens is the most rapid of the rectilinear type, working as it does at a speed of f/6 and covering an angle of view of 70 degrees. Although this lens is far from equal to the anastigmats, it is a good lens for general work and gives admirable service
Illustration No. 67 for rapid instantaneous photography and portraiture in the gallery and home. As will be seen from Illustration No. 66, the mounting is very compact, and the lenses, although of large diameter (See Illustration No. 67), are thin and do not appreciably increase the weight.
763. We manufacture another rectilinear lens, known as the Rapid Universal, having a speed of f/8, its angle of view being 60 degrees. This lens is the original rectilinear or symmetrical type introduced by us, and it was an important factor in the making of our reputation for the manufacture of photographic products.
Mt. Shasta at distance of seven miles, made with doublet Plastigmat by H. H. Derr Illustration No. 64 - See Paragraph No. 761.
Illustration No. 68 See Paragraph No. 803.
Illustration No. 69. See Paragraph No. 803.
Illustration No. 70.
See Paragraph No. 810.
Illustration No. 71 See Paragraph No. 810