10-25-2012, 10:07 AM
Quote:their 18-135 is basically the same as the Tokina 16.5-135mm
Pentax:
13 elements in 11 groups
incl. 2 aspherical (glass molded & hybrid) + 1 ED elements
http://www.opticallimits.com/pentax/597-pentax_18135_3556
Tokina:
15 elements in 9 groups
incl. 3 aspherical + 2 SD elements
http://www.opticallimits.com/nikon--nikkor-aps-c-lens-tests/654-tokina16135dx