Viltrox 55mm f/1.8 EVO: The Inevitable Upgrade To Another Excellent Viltrox Lens. Subtitle: An I Want To Not An I Need To Upgrade. To start I will cut and paste the opening of my post on the Viltrox 50mm f/2 Air. My 50mm-ish lens problem is well documented in this space. M mount edit. Sony-verse … Continue reading Viltrox 55mm f/1.8 EVO: The Inevitable Upgrade To Another Excellent Viltrox Lens.