14" f7.7 Ross Goerz (early Dagor) Double Anastigmat brass lens

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Before I describe this lens, here is an extract from the outstanding 'A Len's Collectors Vade Mecum' regarding this line of lenses:- "...Ross also made a large number of Double Anastigmat lenses engraved 'Goerz' and these seem to represent a license arrangement with Goerz to parallel that with Zeiss but for just the Series 111 later to be called DAGOR. They are attractive items, often still........in good order, but are mainly of the older f7.7 series. They are a good way to obtain this design in the UK as the Goerz f7.7 is scarce here, and it was really the later f6.8 which was the first imported in quantity from Goerz.......It was listed c.1896-1902......." This particular Ross Goerz ("RG") lens has the s/n: 146 and clearly dates from the very early period of 'this licensing arrangement'. The only defect, if in fact it is 'a defect', is the slight ding to the outer rim of the rear element. As far as I am aware, RG lenses in this focal length ("fl") are fairly uncommonThe brass shows much discolouration and character, there is also the original flange which has an outer width of 92mm mounted on to a wooden lens board. The front section has a width of 61 mm and the length is a very compact 69mmLenses of this design can be used as convertibles, i.e. not just with both elements in place but with either element separately, the result read more

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