Percussive maintenance, or "If in doubt, give it a clout"

[bellinghman]

Actually, I didn't, but I did consider the option

Comments

[hobnobs]

I had a very similar problem a few decades ago with an old Praktica... Although in my case it was that a clip had moved from where it was supposed to be and had hooked the mirror.

I'm not sure how your Nikon handles the intricacies of range-finding, but from experience it may be worth having the mountings checked to make sure fine focal length at distance hasn't been affected by the knock. (It's rare, but I've seen a few knocks that caused ever-so-slightly loosened mountings that caused issues on <200mm lenses... (It was barely detectable for everyday stuff, but noticeable when shooting at longer ranges.)

[bellinghman]

A good point, but it seems OK as far as that's concerned.

[hobnobs]

Excellent news. :)

[bellinghman]

See my followup post - it wasn't ok after all, but now fixed.

I suspect it was a different issue, since it wasn't the mounting but the other end of the barrel.