LOMO OKS1-18-1 lens
This optical block is early LOMO production with large front element ad small rear one.
There is no focusing mount - you'll have to adapt it to your system yourself.
Diaphragm is present, but there is no diaphragm control ring - you can operate it with a pin, but this is not very convenient.
The lens is in excellent cosmetical and optical condition. If you can put some efforts into adapting it to your needs, you'll get great wide angle lens.
Max. diameter: 100 mm
Mount diameter: 21 mm thread
Length: 85 mm
Weight: 413 g
Both front and rear caps are included.