Today I ordered new Tamron 28-300 XR (non Di) lens for my KM 5D.... @ Cameta they sell them right now for $144. I think it is a good price but I'm little worried if I made a good decidion over a Di version (which is $369 @ B&H). So far what I read there should not be a significant difference between Diand non-Di other than coating. And I hope I do not run in to the problem with a glare. But generaly $144 for non-Di vs $369 for Di .....I don't think that the difference in price justifies the preformace. Correct me if I'm wrong.
link from Ebay: