Constant aperture F4.0 zoom lens; a feature normally associated with the better quality zooms. I have designated it as "Used", but has had very little use indeed. It is worthy of described as MINT condition.
This lens enables the shooting of fisheye images with a 180-degree angle of view and a focal length of 10mm. The image circle of the lens has been created to match the smaller image recording area of the istD-series.