Full Version: Tamron 28-75mm f/2.8 RXD development announcement
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(just restoring some base topics from the old forum)
The full name is "28-75mm F/2.8 Di III RXD (Model A036)". 
Does the "III" means it' based on the old SLR lens design ?
The "Di III" means it is for mirrorless, not DSLR.