Okay, I admit this is not one of my large format lenses, but I'm turning to any of you are Nikon aficionados for advice.

My well used 500mm reflex nikkor has suffered a catastrophic separation of the rear elements.....like 85% or more of the diameter. I haven't used a Nikon sanctioned facility in decades, but this is likely one that will need that attention if it can even be salvaged.

So I'm asking for referrals to the Nikon repair source that any of you would suggest, preferably in the USA.

Many thanks.

Tim