Rehousing of vintage lenses, Custom- Pentacon 29mm f2.8 electric multi coating

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This customized lens housing is optimized for Pentacon 2.8/29 eletric Multi coating.( I guess it can be installed on similar pentacon 2.8/29 auto) This unusual lens with a focal length of 29mm has the disadvantage that it is not sharp at the widest open aperture(f/2.8), but I think it is a useful lens that is very inexpensive and can take close-ups because it can shoot up to 25cm. Filter adapters (55-82mm step-up rings) were used because it was very difficult to create a stable and durable filter thread with 3D printing. In addition, M5 grub screws were used to fix the rehousing more stably. Parts M5 grub screws x3 55-82 step-up ring(filter adapter) M42-EF adapter The basic specifications of the pentacon 2.8/29 lens are as follows. WA lens made in Germany (the former GDR) Focal length : 29 mm Max. aperture : f2.8 Min. aperture : f22 Iris : 6 blades Half click-stops available Auto/Manual sliding switch Multicoated glass Min. focus : 0,25 m Filter diameter : 55 mm Weight : 204 g For more information on cinematic lens rehousing, please see the link below. https://surplusperson.tistory.com/category/%EC%9A%B0%EB%8B%B9%ED%83%95%ED%83%95%20%EB%A7%8C%EB%93%A4%EA%B8%B0%28DIY%20%26%20MOD%29/Cinematic%20Lens%20Rehousing