<p>Hi all it is a large format plate film camera lens i have three 180mm 4.5,250mm 4.5,300mm 4.5 all three i converted with a old vivitar 28-200mm lens helicoid and used on my 35mm Praktica ltl camera and i now use them on my canon digital 1000D and 60D<br>
you can see 250mm and 300mm <br>
here you can see my love for zeiss </p>