It can also be used in standard microscopes without this facility, but you may observe a disc of slightly different brightness in the image. The lens can also be used for macrophotography. In this case, the distance from the lens flange to sensor should be 200mm. Shorter distances will give lower magnifications and may result in vignetting. Longer distances will give higher magnification but possibly reduced image quality.
The interferometry disc may also be visible depending on which distance you use. There are some marks on the black conical metalwork at the end face of the objective, but the glass itself is in good shape.This item is in the category "Business, Office & Industrial\Healthcare, Lab & Dental\Medical/Lab Equipment Attachments & Accessories\Microscope Parts & Accessories\Microscope Objectives". The seller is "bernarfoo_0" and is located in this country: GB. This item can be shipped to United Kingdom.