Apochromatic: Sigma 180/2.8 APO Macro DG HSM vs Leica 180/2.8 APO-Elmarit-R
The Leica 180mm f/2.8 APO-Elmarit-R has a cult following among Nikon and Canon users (converted for Nikon or with an adapter for Canon). I bought mine some years ago brand-new (latest variant), back when it was still in production.
Given the stellar reputation of the Leica 180mm, can one reasonably expect that a Sigma lens might compete with it? Using the expression “when pigs fly” (foreign readers might find that one odd), well, pigs are airborne as we speak.
In DAP is presented a 3-way APO comparison of the Sigma 180/2.8 APO vs Leica 180/2.8 APO-Elmarit-R vs Voigtlander 180/4 APO-Lanthar.
The comparison is also cross-posted in Guide to Leica.