Industar-61 LZ 2.8mm f/50. 1976. USSR. Features: The lens is in excellent, fully functional condition – the lens elements are clean, focusing and aperture action are smooth and easy. The aperture blades are dry, without excess lubrication. The lens was part of a private collection and was stored at home at optimal temperature and humidity. A very rare lens. My highest recommendations to the winner!)))!!! The Industar-61 L/Z (Lanthan/Mirror) 2.8mm f/50 is a Soviet lanthanum-coated SLR lens known for its high sharpness (Tessar design, 4 elements/3 groups). It features MS coating, a flange focal distance of 45.5mm (M42 thread), making it suitable for use on digital cameras, and excellent macro capabilities. Key Features and Description: Focal Length: 50mm (standard lens). Aperture Ratio: 1:2.8 (aperture range 2.8–16). Type: Anastigmat, Tessar. Lanthanum ("L"): The use of lanthanum glass improves image clarity. Mirror ("Z"): Designed for SLR cameras (flange focal distance 45.5mm). MS (Multi-Layer Coating): Improves contrast and reduces flare. Aperture: 6 blades, creates a characteristic "starry" bokeh. Minimum focusing distance: 0.3m, allowing for close-up photography. Weight: ~131g. Advantages: High sharpness at wide open aperture. Convenient M42 thread, easily mounts on most modern cameras with adapters. Excellent for macro photography (in combination with extension tubes). Disadvantages: Doesn't like backlighting (even with macro extension tubes). The 6-blade aperture can produce "bulged" bokeh. The lens is versatile, suitable for both portraits and product photography thanks to its ability to capture detail. Your package will be securely packaged to protect it from all potential risks during transportation. This item will be shipped from outside the European Union, so your country may or may not charge customs duties according to its customs tariffs. By placing a bid, you confirm that you have no claims in this regard, as I cannot predict which country will purchase the item or what their customs regulations are; it is possible that there will be no customs duties at all. If you would like to combine parcels, this is only possible if you win and purchase both the charity item and the regular item. This way, you save money on shipping and simultaneously help the children and soldiers of Ukraine. Ultimately, I am proud of you and grateful to you for this!!))) If you win the charity item and want to also buy the item to save on shipping, simply write to me immediately so I can delay shipping to save you money.