Hi,
I am trying to match some photos taken in 1907-8 with equipment accompanying a half-plate R J Beck camera now in the Oxford Museum of Science. The camera was used by T.E. Lawrence for castle & church photos, mainly in France. I think most of the photographs used the 7.25" Taylor Taylor & Hobson "symmetrical meniscus doublet" lens which is with the camera, but some would have needed a wider angle lens, and some a longer lens.
There is also a Ross 3.25" (86mm) F.16 wide angle anastigmat lens with the camera, but from the info I can find this wouldn't have fully covered half-plate or allowed room for adjustment. It is apparently more a quarter-plate lens (photos attached).
Another lens is engraved Dallmeyer London Rectilinear Patent with F=3"=75mm and No. 75287 on the rim. There is no iris. The serial number would put its manufacture date a little after 1902, which was S/No. 65,000. Can anyone shed any light on how this lens was used? e.g. is it a screw-on adaptor to modify the focal length of another lens with an iris? In the Dallmeyer box is a green filter of similar dimensions. There is room in the box for another lens or barrel body which might now be missing. It seems unlikely, but could the 3" could have been used with the Ross or TTH lenses (I would have to find out if the threads match).
Thanks for any assistance.
Nick
Bookmarks