Canon LTM 50/1.4 v1 vs v2.....what really is the diff?

Discussion in 'Leica M and LTM Lenses' started by uhoh7, Jul 25, 2015.

  1. uhoh7

    uhoh7 Leica Place Regular

    163
    Oct 14, 2014
    Many seem to be under the impression the v2 is a new formula, but I don't believe it.

    For example:
    19982632716_af5302945e_z.
    Type-I-Schematic
    by unoh7, on Flickr

    seems like more than 6 elements to me. i.e. I don't think the schematics are reliable.

    Brian, I bet you have been inside both, is there a different element count?

    TY, sirs
    all comments welcome.
     
  2. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    I've had both the Type 1 and Type 2: the only difference is in the focus mount. The Canon 50/1.4 is a 6 element in 4 group classic 1-2-2-1 Double Gauss.

    Your diagram is a 1-3-3-1 8 element in 4 group Double Gauss- looks very close to the 5cm F1.5 Simlar which is a 1-3-2-1. I need to look up yours in Neblette's "Photographic Lenses".
     
  3. uhoh7

    uhoh7 Leica Place Regular

    163
    Oct 14, 2014
    That's what I thought!!!

    TY so much, Sir!!

    PS Looks like the 50/1.4 is pretty similar to the original Nokton 50/1.5, Voigtlander?
     
    Last edited: Jul 26, 2015
  4. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    The Voigtlander Nokton 50/1.5 is a Double-Gauss, I remember 7-elements. Looked it up- 7 element in 5 groups, a 2-1-1-2-1 configuration. The front element is a doublet, like the Summitar.