weird microscope on Fujica

[kiddo]

Does anyone know what's this all about? I assume it was made for macro purposes ,but exactly ,what kind? Seller said it was used for dentistry, I am not sure about it at all

[calvin83]

[RokkorDoctor]

My best guess:

From another eBay listing with a similar looking SHINKO OPTICAL "lens" it was suggested that for many years Shinko Optical specialises in arthroscopy instruments, which they still seem to feature on their website.

It appears that during an arthroscopy, the eyepiece used by the surgeon could be removed and a camera then connected (presumably using the adapter shown on the camera) in order to take a photograph during the arthroscopy.

A very poor image seems to show such a photographic exercise in the pdf linked below (2nd photo on page 78 ):

https://www.tandfonline.com/doi/pdf/10.1080/08998280.1996.11930007

Another image showing a similar setup using an SLR film camera:


Source: https://www.sciencedirect.com/science/article/pii/S2773157X22000662

EDIT: there is also an outside chance this adapter fits directly into the tubus of a microscope once the ocular has been removed, but I suspect my first guess would be more likely.

[kiddo]

wow , thank you all for such a valueable information.
I wonder how many makers were ever involver in such tools specialized for the med industry?
would there be any chance to use the lens on FF as an extreme macro just like it is right now? it has no iris and no focusing ring, but that wouldnt be a problem, it might be f11 or so i assume

[calvin83]

[kiddo]

Thanks, for now I'd stick with yashica and vivitar 55mm macro and Tamron90mm/yashica100mm but I was just curious about the results such a lens would be able to show. Laowa apo it proves to be a solid contender,dunno about astrhori.