Keystone View Company
Changing Fixation from 7 to 4 requires 11 1/2 prism diopters of Positive Convergence. The Keystone Eye Comfort and Depth-Perception Series.

Changing Fixation from 7 to 4 requires 11 1/2 prism diopters of Positive Convergence. The Keystone Eye Comfort and Depth-Perception Series.

Public Domain

Changing Fixation from 7 to 4 requires 11 1/2 prism diopters of Positive Convergence. The Keystone Eye Comfort and Depth-Perception Series.
CultureAmerican
Titles
  • Changing Fixation from 7 to 4 requires 11 1/2 prism diopters of Positive Convergence. The Keystone Eye Comfort and Depth-Perception Series.
Dateabout 1930
MediumGelatin silver print, stereograph
DimensionsImage (Each): 3 1/16 × 3 in. (7.8 × 7.6 cm)
Sheet: 3 1/16 × 6 in. (7.8 × 15.2 cm)
Mount: 3 7/16 × 6 15/16 in. (8.7 × 17.7 cm)
Credit LineGift of Malcolm Daniel and Darryl Morrison
Object number2021.555
Not on view

Explore Further

Department
Photography
Object Type
ProvenanceMalcolm Daniel and Darryl Morrison; given to MFAH, 2021.
Inscriptions, Signatures and Marks
Printed, mount recto, left: KEYSTONE STEREOSCOPIC SERVICE // SKS // COPYRIGHT UNDERWOOD & UNDERWOOD, INC.
Printed, mount recto, top center: EC // 3
Printed, mount recto, top right corner: B01
Printed, mount recto, right: KEYSTONE VIEW COMPANY // SKS // OFFICE AND STUDIOS // MEADVILLE, PENNA. MADE IN THE U. S. A.
Printed, mount verso: THE KEYSTONE EYE COMFORT // AND DEPTH PERCEPTION // SERIES // For the Development of Comfortable Vision // and a High Degree of Depth Perception // // E. C. 3–V32931 Changing Fixation from 7 to 4 requires 11 ½ prism diopters of Positive Con//vergence. // // KEYSTONE VIEW COMPANY, Meadville, Penna. Printed in U. S. A.

Cataloguing data may change with further research.

If you have questions about this work of art or the MFAH Online Collection please contact us.

Peering Down into Awesome Depths of Box Canyon, Ouray, Colorado.
Keystone View Company
c. 1914
Gelatin silver stereograph
2004.1220.257
"Unclean! Unclean!" wretched lepers outside Jerusalem Palestine, (St. Matt. viii;2-4.)
Keystone View Company
c. 1914
Gelatin silver stereograph
2004.1220.17
Bird's-eye view of Naples and Vesuvius
Keystone View Company
c. 1914
Gelatin silver stereograph
2004.1221.45
The Triumphal Arch of Constantine, Rome
Keystone View Company
c. 1914
Gelatin silver stereograph
2004.1221.33
Sacra Via, over which Rome's triumphal pageants passed - west from the Colosseum - Rome
Keystone View Company
c. 1914
Gelatin silver stereograph
2004.1221.32
Bridge and Castle of St. Angelo (A.D. 136), Rome
Keystone View Company
c. 1914
Gelatin silver stereograph
2004.1221.19
Bower of St. Anthony, Vatican Garden, Rome
Keystone View Company
c. 1914
Gelatin silver stereograph
2004.1221.18
Looking southwest from Monte Pincio - St. Peter's in the distance - Rome
Keystone View Company
c. 1914
Gelatin silver stereograph
2004.1221.21
The Tiber, Castle of St. Angelo and St. Peter's Church, Rome
Keystone View Company
c. 1914
Gelatin silver stereograph
2004.1221.20
Tomb of Clement XIII, St. Peter's Church, Rome
Keystone View Company
c. 1914
Gelatin silver stereograph
2004.1221.13
Wonderful mosaic - copy of Raphael's Transfiguration, St. Peter's Church, Rome
Keystone View Company
c. 1914
Gelatin silver stereograph
2004.1221.12
The Vatican Palace, residence of the Pope, Rome
Keystone View Company
c. 1914
Gelatin silver stereograph
2004.1221.15