mhayashi
4-Mar-2023, 03:41
I have been offered one of the rare Dallmeyer Group lens f4 series, which I didn’t know until yesterday.
The series was made for 8x10, 10x12 and 12x15 during the short period in 1866 only, based on the Dallmeyer archive index.
http://thedallmeyerarchive.com/Records/Volumes/stockbook2/Indexes,%20lens%20lists/lens%20list%205-2.pdf
Vade Mecum states the series was made since 1861, but the Dallmeyer archive negates it.
In VM, it says the middle achromat group of the triple achromat series was replaced to the larger one to form the group lens.
I don’t have both series with the same front and rear lens diameter group combination in hand so not quite sure about the truth.
It is certain that this group lens series was not successful as the number of productions was only 220 for the whole series.
These are all I have got about the group lens.
If you know about this series, let me know.
The series was made for 8x10, 10x12 and 12x15 during the short period in 1866 only, based on the Dallmeyer archive index.
http://thedallmeyerarchive.com/Records/Volumes/stockbook2/Indexes,%20lens%20lists/lens%20list%205-2.pdf
Vade Mecum states the series was made since 1861, but the Dallmeyer archive negates it.
In VM, it says the middle achromat group of the triple achromat series was replaced to the larger one to form the group lens.
I don’t have both series with the same front and rear lens diameter group combination in hand so not quite sure about the truth.
It is certain that this group lens series was not successful as the number of productions was only 220 for the whole series.
These are all I have got about the group lens.
If you know about this series, let me know.