[davidmanze]

   A different viewpoint of the D series lenses!   :o 

  Couplet count, 

 

  AF-20.......F2.8D  12elements in 9 groups......dead!!

  AF-24...... F2.8D   9 elements in 9 groups......alive and risk free

  AF-28.......F2.8D   6 elements in 6 groups......alive and risk free

  AF 35.......F2.8D   6 elements in 5 groups......alive for the moment.

  AF 50 ......F1.8      6 elements in 5 groups......alive but newish.

  AF 85.......F1.8      6 elements in 6 groups......alive and risk free.

  AF-S 500 ED..F4D 11 elements in 9 groups...alive but OMG!