Anyone shed some light on this ?
Dallmeyer triple achromatic, weighs about 3.5kg, overall length 9", diameter across the front lenshood 5.5" (front element diameter 3.5")
I gather the achromat was a very early design of lens which was replaced by other types ?
Doing a very crude measurement of focal length it was showing around 35 inches ! I stress though I'm not familiar with measuring these things.
Wondering what it's primary use would have been....... landscape ? Or what format it would cover ?