HELIOS-44M-6 58mm, f/2 prime lens. - Model: HELIOS-44M-6 - Focal Length: 58mm - Maximum Aperture: f/2 - Mount Type: M42 - Accessories: Generic lens cap This is a popular Russian lens. The lens appears clean, but it is a used item, so please check the images. The exterior has some scratches, etc. There appears to be no major damage. Made in Russia, so don't expect high build quality. It rattles when shaken, but please purchase only if you are comfortable with this. No returns. No cancellations. Thank you for viewing. The mount is M42, not K. Please be aware.