Sigma 20mm f/1.4 DG DN | Art - Sony E, Leica L Mount

Designed specifically for mirrorless systems, this ultra-wide-angle Art series lens features a fast f/1.4 aperture. It is highly regarded for astrophotography due to its excellent sagittal coma flare suppression and dedicated features like a MFL (Manual Focus Lock) switch and a lens heater retainer. The optical construction includes multiple SLD and aspheric elements to maintain sharpness into the corners. Check used units for the smooth operation of the aperture click switch and the MFL toggle. SDS verifies the autofocus performance and inspects the front and rear elements for any signs of marks. Given its size, ensure the tripod socket (if included) and the rear filter holder are undamaged. The barrel should be free from significant impact marks that might suggest internal misalignment.