Ich habe gute erfahrungen mit mein ISCO Ultrastar HD-plus 185 MC2,1 aber ziehe vor ein Helicoid focus einrichtung. in English, Hence I need to pisk out the optical block, from its mount. Does anyone have any tips on how to do this? The unbrako screws in front look tempting , but i need the entire block, not just a destroyed front part.

Enclosded is an unfocussd snap of the front of the lens.

p.

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