Help me refine Voigtlander Serial Numbers

[CCHarrison]

Steven - Euryscop(e) was used as a term in an 1878 Vienna based photography book as well. See http://books.google.de/books?id=9i4y...ryscop&f=false

In fact, in this 1882 book, there is a passage about Voigtlander and the making of Euryscops in f/6 speed in 1878 http://books.google.de/books?id=Fiq2...ryscop&f=false

And a table listing the sizes !!!




1886 was when Voigtlander announced the PATENTED Euryscop lenses...

Dan

[Steven Tribe]

Well this is fun! This table represents an approximation to the later series IV - starting at F6 for the smaller sizes but going past F7 for the larger sizes. But there is no exact correspondence in the larger lens size numbering.
Tomorrow I'll check the old list of unmarked "euryskops" to see how many fits there are to this table.

[Hugo Zhang]

There is a just ended item on ebay 221440288111. Serial number is 24069. Any idea of its focal length and f stop?

[Struan Gray]

why production all but stopped from 1869-1873 ?

Franco-Prussian War?

[Steven Tribe]

Hugo, this is lens that was very popular and is quite "common" in the list of pre-Euryskops from Voigtländer.

It is very close to the later Series IV. The size 6, which this is, has the following data:

Focal length is 21.33", Front lens diameter is 3.5" and listed coverage is for 18x22". This matches well with the lister's physical dimensions (lens - not himself!).

[andrehh]

If I could only read German, I could dig more..... any German readers want to read my copy of this book and help find out why production all but stopped from 1869-1873 ?

Dan

Hi Dan,

no problem to read and translate. Just send me the text. I'm happy to assist.

Best regards
André

[Hugo Zhang]

Steven,

It is a Petzval and the focal length is not longer than 300mm. Rear elements are two lenses screwed together with a diameter of 3.6 inches. Speed about F/3.5?

[CCHarrison]

Hugo

Probably a # 6 Petzval - first series - for 8x10 f/3.6 3.5" diameter lenses, back focus should be 9" and F/L about 13.5"

Dan

[Steven Tribe]

Yes agreed. The listing didn't give a good side photo to judge the position of the Waterhouse slot, but it does appear (when you know what to look for!) to be off the central position - which Euryskops have! This is one of the plain barrel Series.