Informal grade guide:New- Just that, in the original packaging, with all the correct paperwork.New(OTHER)- Usually unused, in complete original packaging, with instructions.
Mint,Mint(+,++)- Previously owned and used, but in perfect cosmetic and functional condition.
Mint (-)- Lower range of the mint. Shows few minor marks.
Excellent(+)- Between Mint and Excellent.
Excellent- Light signs of use. Might have slight marks and/or dings on finish,
typically on corners. Lens optics very clean, but may show minor cleaning
marks.
Excellent(-)- Between Excellent and Good.
Good- Shows average wear. May have slight ding
Fair- Shows much more than average wear. May have dents, dings and good amount of finish loss, but is generally fully functional.