What do the Wiki's "ordinal" numbers mean?

[philipus]

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I'm not sure this is the right forum as the question may concern the Wiki and how it organises information, rather than Leitz/Leica lenses as such. In such a case please feel free to move it.

 

What I am wondering is what the Wiki's "ordinal" number refers to? One can organise lenses by ordinal number (for instance here for screw mount lenses) but I find little logic in these numbers.

 

Apologies if it is a dumb question

[pop]

I don't know, either.

 

However, I presume that the ordinal numbers serve to uniquely identify each type, thus providing a convenient "handle" for reference. That might serve to remove ambiguities when referring to similarly named lenses.

 

Just guessing.

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[pico]

In this case it appears to mean that the lenses are listed in the order of first year of manufacture.

 

I think.

 

Ordinals are very often used when manufacturer's naming conventions have no distinguishing order for the article.

Edited November 5, 2012 by pico

[jc_braconi]

chronology about issues reference

Edited November 5, 2012 by jc_braconi

[tdavis]

We thought you would never ask

 

The wiki has 3 lists, Ordinal, Focal-length & Type, for the Screw, M, R and Viso lens categories, with each containing the same group of lenses. The remaining lens categories, C, D and S, have fewer lenses and are without separate lists .

 

The ordinal numbers run from the first modular lens to the most recent issued lens: -1 Elmar (I) f= 5 cm 1:3.5 , -178 TS-APO-Elmar-S 120mm f/5.6 ASPH.

 

Leica has issued ~178 lenses, and counting.

Tim