BERTHIOT PARIS,STELLOR SERIE1aNo3 image circle?

[norm the storm]

Hi

Is anybody knows something about the image circle of this lens. What format maximum?

Thank you

Norm

[Steven Tribe]

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]

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]

A side view shows it couldn't be a triplet!

[norm the storm]

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.