Lens manufactured in 1966. New and unused, the lens surface is sparkling clean and in excellent condition. I've listed this several times in the past, and it's a popular lens that sells quickly. I requested it from a German specialist over six months ago, and I finally obtained it. Compared to the past, it seems there are no more dead stock items available, and I think it will be difficult to list it in the future. This is your last chance, so don't delay! This is a Pentacon 80mm f2.8 M42 mount, famous for its bubble bokeh. It has a built-in helicoid, allowing for fine focus adjustments. This is a very rare VEB Pentacon AV (Meyer Optik Diaplan) 80mm F2.8 modified M42 mount lens, the king of bubble bokeh lenses, boasting the largest aperture in the Diaplan series. The Diaplan 80 and Pentacon 80 have different engravings, but they are exactly the same lens. The PENTACON AV/DIAPLAN series of projector lenses can be modified and repurposed for photography to produce bubble bokeh, making them a popular substitute for the expensive Trioplan. This is a modified lens that allows the VEB Pentacon AV 80mm F2.8 to be used with an M42 mount. Bubble bokeh has been trending in the old lens field for several years, but the Trioplan by Meyer Optik, which ignited the boom, actually has a sister product, the Diaplan, which was supplied for projectors. The lens configuration is the same as the Trioplan, and it produces bubble bokeh almost identical to the Trioplan, making it a recently noticed product as a substitute for the expensive Trioplan. In test shots, I was able to shoot clearly without any problems. This is a modified lens that converts a Diaplan AV 80mm F2.8 lens to an M42 mount, allowing for focusing. The aperture is fixed at F2.8. There are no operational issues. Shipping is free nationwide via Sagawa Express.