One of the lenses on my wish list is the SIGMA APO 50-500mm F4-6.3 EX HSM.
Can anyone explain the difference between the RF & DG version.
From what I could find on the net the DG seems to be the newer version (with a new coating on the lens) & is slighty cheaper.
Sigma4less is the only place where I found both lenses listed:
Sigma Zoom Normal-Telephoto 50-500mm f/4-6.3 EX APO RF HSM Autofocus Lens for Nikon AF-D (735306) -
Sigma Zoom Normal-Telephoto 50-500mm f/4-6.3 EX APO DG HSM Autofocus Lens for Nikon AF-D (736306) -
Would appriciate any light that can be shed on this. Thanks in advance.
Wasim.