PHOTOGRAPHY.—A New Work, giving Plain and Practical Directions for obtaining both Positive and Negative Pictures upon Glass, by means of the Collodion Process, and a method for Printing from the Negative Glasses, in various colours, on to Paper. By T. H. HENNAH. Price 1s., or by Post, 1s. 6d.
Published by DELATOUCHE & CO., Manufacturers of Pure Photographic Chemicals, Apparatus, Prepared Papers, and every Article connected with Photography on Paper or Glass.
ROSS'S PHOTOGRAPHIC PORTRAIT AND LANDSCAPE LENSES.—These lenses give correct definition at the centre and margin of the picture, and have their visual and chemical acting foci coincident.
Great Exhibition Jurors' Report, p. 274.
"Mr. Ross prepares lenses for Portraiture having the greatest intensity yet produced, by procuring the coincidence of the chemical actinic and visual rays. The spherical aberration is also very carefully correct, both in the central and oblique pencils."
"Mr. Ross has exhibited the best Camera in the Exhibition. It is furnished with a double achromatic object-lens, about three inches aperture. There is no stop, the field is flat, and the image very perfect up to the edge."
A. R. invites those interested in the art to inspect the large Photographs of Vienna, produced by his Lenses and Apparatus.
Catalogues sent upon Application.
A. ROSS, 2. Featherstone Buildings, High Holborn.