Tamron is sending their Tamron 17-28mm Di III RXD FE to reviewers and so far opinions have been universally positive like for the Tamron 28-75mm Di III RXD FE. Tamron’s light high-quality designs have been very attractive and it looks like the Tamron 17-28mm Di III RXD FE is going to be difficult to get for months like the 28-75mm.
Since Tamron is having trouble keeping up with demand there has been speculation online that the lens will go up by $100 like the 28-75mm did, which could happen, but I think it will depend more on long term availability. 17-28mm preorders could be beyond expectations simply because of how poorly the 28-75mm launch was handled. I do not think Tamron will raise the 17-28mm price if we see high availability in 2-3 months, but if it goes longer like the 28-75mm did than I think a price increase will become inevitable.
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Tamron 17-28mm f/2.8 Di III RXD FE: B&H Photo / Amazon / Adorama
Tamron 28-75mm f/2.8 Di III RXD FE: B&H Photo / Amazon / Adorama