what lens is this?

[Steven Tribe]

Yes, but the ebay lens has the same position aperture for the WHS as your iris. Could be your aperture has an unknown (French?) F scale.

[DrTang]

FOUND IT - thank you al gore ..inventor of the innernet!!!

french markings and their modern equivalents:


1/8 = F/3.4
1/4 = F/5
1/2 = F/6.8
1 = F/10
2 = F/14
4 = F/20
8 = F/28

"the French system" in France and early Steinheil lenses.


so..1/2 = f6.8 - - -seems legit

[Jody_S]

mines bigger physically..bigger glass... and has an aperture ring

might be it..need to see a later example maybe

You should be able to tell exactly how much bigger or smaller, the "64mm" on the fleabay lens refers to the diameter of the front element. If yours is 3" (76mm), then it is one size larger than the fleabay lens. From the Vade Mecum :

Gruppen Antiplanet Series 1 (1879) f6.2 This is a bulky lens with a big rear component. (Ste007) These
were rated to cover 70°.The example seen was No31,43x and seems to be actually about f7.0 7.0in and best
for 1/4 or perhaps 5x4in plate. Another at No13,30x seems to be about f6/20in with a 78mm front glass
(Gruppen Antiplanet 78mm is engraved on the flange). When actually seen, it is big but not impossibly so and
a very impressive item.