Zeiss vs Zeiss. The Sony 50 1.4 vs 55 1.8.
Zeiss FE 50mm f/1.4 Planar vs. Zeiss FE 55mm f/1.8 Sonnar - Admiring Light
50mm size comparison between the new Sigma, Zeiss and Sony – sonyalpharumors
Sony 50mm F1.4 G Master vs Sony 55mm F1.8
FS: *Price Drop* Sony ZEISS 50mm F1.4 ZA Lens with Alphagvrd Brushed Metal Skin - FM Forums
Zeiss 55mm F1.8 vs Sony 50mm F1.8 Comparison
Sony FE 50mm f/1.8 vs. FE 55mm f/1.8 – The complete comparison - Mirrorless Comparison
Sony FE 50mm F1.4 ZA vs 55mm F1.8 ZA by Dpreview – sonyalpharumors
Sony 50mm f/2.5 G Lens Review: All the G you need? – Chad Wadsworth
Shootout - Shootout: Sony FE 55mm Sonnar, Zeiss Loxia 50mm Planar, Leica 50mm Summilux-M Compared