In a bid to increase our collective wisdom ... (calling Dan Fromm ...)
here is a Nikon Process lens of 240mm length and f10 ....
https://www.ebay.com/itm/Process-Nik...UAAOSwcaZcaioD
The information garnered by Mr Fromm (all hail Mr Fromm) that I have seen does not include this one.
See the weird extended lens cap too.
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