Small number behind "m" & "feet" on the Leica lenses

[Nugard]

What does it means?..
On most Leica lenses there's such sign... I'm thinking of the step of the lens, how fast it shows forward with turning... Don't know how to explain...😱

Could someone explain what exactly does it mean, and show some more info on what numbers are on others Leica lensen?..

 

[FrozenInTime]

52.2mm actual focal length in your case

 

[maddoc]

Can be found on 50mm and longer lenses (Tele) and shows the actual focal length. "22" means 50 + 2.2 = 52.2mm. My Noctilux has a "00", so it is actual 50mm.

 

[Nugard]

WOW!.. Really interesting news... Thanx guys!.. 😉

 

[raydm6]

Check out these links:
Old pnet...

...and on Leica FAQ...

I have a 136mm f/4 Tele-Elmar 😀...

 

[Treb]

Stereo photography is an application where one would want to have two lenses of identical focal length. The additional numbers enables the user to find and use identical lenses.

 

[Olsen]

Thanks for this info. I did not know this.

I have only three Leica lenses; a Noctilux (it is labeled '00'),a 34 mm 2,0 (no labeling) and a WATE (no labeling). That said, I doubt that the Noctilux is a 50 mm focal length lens. It shows a narrower field of view compared to both Voigtländer 50 mm 2,5 and my Carl Zeiss 50 mm 2,0 ZM. Neither of the two latter is labeled with anything. Are these of longer focal length then?

 

[johnny.moped]

here's another (maybe more detailed) explanation: http://www.imx.nl/photo/leica/lenses/lenses/lenses/page89.html