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I know it's early, but if one has let's say the Canon 85 1.8 and shoots mostly at 2.8 would something like the Tamron 85 1.8 or the almost released Sigma 85 1.4 Art have any major advantage at 2.8 and above (smaller aperture/larger number)?
This hypothetical person does really well with the 85 1.8, but also strives to have the best possible lenses (within reason) with minimal gear (nothing that sits in the bag or on the shelf).
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