Originally posted by RobA_Oz I didn't read the posts that "hammered" you, but I hope they weren't too abusive.
Meh on the slap down. I'm an "other." (There are serious photographers and . . .others). Dripping with sarcasm was all, as if I should have known that a group of 5 lenses, each less than 12mm FL, was issued by and for Nikon for the F-mount. I'd be surprised if 1000 of the lenses combined were manufactured.
Originally posted by RobA_Oz Come to think of it, you could probably say the same about the Rear Converter Ls as well, as they clearly have a protruding element, and shouldn't be fitted to lenses that don't have a recessed rear element, but I don't know if anyone's damaged something in attempting to do so. However, the odds of someone trying this are probably less than trying to fit an XS lens to a DSLR, but both are fairly remote, in my view.
The Rear Converter mounts to a stationary part (lens rear element, so damage is pretty hard to do) - the greater risk is spending money for an accessory that turns out not to fit - so you'd be out a restocking charge. Tamron had 'em - lots of companies had them for specialty extreme-telephoto lenses.
World of difference between that Nikon example and a company known for a 47 year old lens mount, marketing a new camera body as usable with 25,000,000+ legacy lenses, and then making a mass-market lens not usable with 1,000,000 legacy bodies.
It would be at the least good citizenship to make a flange change.
Besides, few have noticed the mystery lens is specifically described as "Production decision not yet made." It could be Vapor-glass.