Aperture Range: f/2 to f/16. Focusing Range: 0.5m to 20m, Infinity. Filter Mount: M49x0.75. USA, Canada, Asia: 14-21 days. Italy: 14 days to 1.5 months (due to postal service delays). Whether you’re a collector of vintage Soviet lenses or a photographer looking for unique optics, this Helios 44M-4 offers both performance and history. A rare and functional piece of Soviet engineering that adds character to any camera setup! ? If you have any questions, feel free to message me anytime! Support Ukraine: By purchasing this watch, you’re also supporting Ukraine in challenging times. Thank you for standing with us!