☆ PENTAX Takumar 200mm F5.6 M42 mount manual focus lens with preset aperture. ☆ The aperture blades are circular with 10 blades, and their movement is truly impressive, like an eyelid! The circular aperture creates beautiful bokeh. I think there are only a few other lenses with 10 aperture blades, such as the Voigtlander for Micro Four Thirds and the SONY 135mm, but I don't know of any others. ☆ The aperture is preset, which has the advantage of allowing focusing at the maximum aperture with film cameras. With digital cameras, the viewfinder remains bright even when stopped down, so it feels like normal manual focusing. ☆ The essential lens hood is also included. ☆ This lens is very rare, as you can see from searches on Mercari and the internet. ☆ When mounted on an APS-C camera with a mount adapter, it becomes a 300mm super-telephoto lens. ◇ Instant purchase OK, please refrain from price negotiations. 【Overview/Operation】 757021 ・ Mount: M42 (K-mount selected because there is no M42 mount setting on Mercari) ・ Aperture: Fully manual ・ Aperture ring: Moderate click feel ・ Preset ring rotation: Moderate and smooth ・ Focusing ring rotation: Moderate resistance and smooth ・ Number of aperture blades: 10 (very slight scratches are visible, but no problem for shooting or operation) ・ Minimum focusing distance: 2.5m ・ Weight: 401g 【Optics】 ・ Three small spots of fungus on the middle element, and very thin white lines are visible on the outer periphery of a part of the lens, but neither affects shooting. There are no scratches, fungus, or clouding on the other lenses, and it is very clear! ・ There is dust that does not affect shooting. 【Appearance】 ・ It is so clean that no scratches are visible to the naked eye, and it is a super-beautiful item. 【Accessories】 ・ Genuine high-quality metal hood, beautiful condition ・ Genuine metal front cap (small dents and scratches) ・ Genuine M42 rear cap (many scratches) ・ Kenko MC-1 filter ◇ If there is a significant oversight that affects the value of the product, please ★send a message without rating the item★. Also, please be aware that there is no warranty for product failures after the transaction is completed, as it is a used item.