View Full Version : BERTHIOT PARIS,STELLOR SERIE1aNo3 image circle?
norm the storm
18-Mar-2014, 05:39
Hi
Is anybody knows something about the image circle of this lens. What format maximum?
Thank you
Norm112345
Steven Tribe
18-Mar-2014, 05:56
Don't have the data, but it is a fast triplet that usually don't have huge coverage.
The, perhaps, equivalent Meyer Trioplan 8 1/4" F3.2 is for 6x4.25" plates. 7x5" is first achieved with the 10" size.
Dan Fromm
18-Mar-2014, 16:02
Go here http://sdrv.ms/1i4czGa for links to Berthiot catalogs.
Stellor is a trade name, not a design type. In the early 1920s, when the lens figured was made, the f/3.5 Serie Ia Stellor's layout was: front () )( | )) )) rear. | stands for the diaphragm. Four single elements, nothing cemented. Claimed coverage is 45 degrees.
Steven Tribe
19-Mar-2014, 01:59
A side view shows it couldn't be a triplet!
norm the storm
19-Mar-2014, 05:32
Go here http://sdrv.ms/1i4czGa for links to Berthiot catalogs.
Stellor is a trade name, not a design type. In the early 1920s, when the lens figured was made, the f/3.5 Serie Ia Stellor's layout was: front () )( | )) )) rear. | stands for the diaphragm. Four single elements, nothing cemented. Claimed coverage is 45 degrees.
Thank a lot for the URL. It's useful.
Powered by vBulletin® Version 4.2.5 Copyright © 2024 vBulletin Solutions Inc. All rights reserved.