I HAVE A BRASS LENS MADE IN BERLIN BY C.P.GOERZ.MADE BETWEEN 1898 AND 1904,I THINK.IT DOES NOT HAVE A SERIAL NUMBER,NOR
DOES IT HAVE THE F-STOP OR FOCAL LENGTH MARKED ON THE LENS.IT IS MARKED-DOUBLE ANASTIGMAT SERIES III NO.9-WHICH MAKES IT A F7.7 24 INCH DOGOR.QUESTION 1-THE STOPS ON THIS BARREL LENS ARE AS FOLLOWS-6-9-12-24-48-96-192-384-768.anyone know what this scale is?It does not seem to be american stops since there is no f-16.question2-since it is known to be a f7.7 can it be remarked with current f-stops.question 3-this lens needs to be taken apart and cleaned.that being the the case should i have it coated at that time-would those of you doing ulf black and white have any prefernce. question 4 anyone seen a dagor without a serial#? since this dagor is not marked as such it would seem to date it prior to 1904-any care to correct my thinking- please feel free thanks.
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