![The lens is a vivitar 50mm f1.7. I understand the aperture and focusing ring . But what do the markings in the middle mean ? Can anyone please elaborate ? : r/AnalogCommunity The lens is a vivitar 50mm f1.7. I understand the aperture and focusing ring . But what do the markings in the middle mean ? Can anyone please elaborate ? : r/AnalogCommunity](https://preview.redd.it/zt5kykgfqem61.jpg?auto=webp&s=15d8896fe5178e44ceb75e17b50ba1b4b52f161f)
The lens is a vivitar 50mm f1.7. I understand the aperture and focusing ring . But what do the markings in the middle mean ? Can anyone please elaborate ? : r/AnalogCommunity
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Neewer Large Aperture Manual Prime Fixed Lens APS-C, 35mm F/1.7 for Sony E-Mount Digital Mirrorless Cameras A5000, A5100, A6000, A6100, A6300 A6500 A9 NEX 3 NEX 3N NEX 5 NEX 5R NEX
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Amazon.com : Panasonic LUMIX G Lens, 25mm, F1.7 ASPH, Mirrorless Micro Four Thirds, H-H025K (USA Black) : Electronics
![Amazon.com : Minolta X-700 Film Camera and A 50mm f/1.7 Manual Focus Lens : Slr Film Cameras : Electronics Amazon.com : Minolta X-700 Film Camera and A 50mm f/1.7 Manual Focus Lens : Slr Film Cameras : Electronics](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/617R4afj2+L.jpg)