I haven't had too much opportunity to try Konica to date: I was most impressed by the Hexar RF, but the dealer wouldn't let me lay a finger on it. I did somehow get ahold of a 50/2 Hexanon lens in Leica M mount, and recall it being very good.
Years ago at a photo swap meet I saw a strange looking item on one of the tables: A Konishiroku aerial reconnaissance camera! I recall it being encased in a sturdy cast metal housing, and it had a clockwork motor drive.
In mid-2021, I picked up an Auto S3 via eBay but should have known better than to buy based on a couple of dark and blurry photos. Besides bearing signs of a botched attempt at opening the lens, optics were fungused, and the light meter was reading way too high. It cleaned up pretty well, though a patch of lens coating was etched away by the fungus. CdS photocell was way off spec, causing the funky meter readings, but that should be one of the easier bits to remedy.
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