Sony 50mm f/1.4, 300mm f/2.8 and 18-250mm f/3.5-6.3 lenses listed as discontinued PR admin 14 years ago Sony Hong Kong has listed the following three Sony lenses as discontinued: 50mm f/1.4, 300mm f/2.8 and 18-250mm f/3.5-6.3: No related posts.