Interesting description in MPB for a Canon extension tube

[legarage90]

.......this lens is in excellent condition with only the lightest signs of use.
The optics are clean, clear with no marks or scratches.
There is an extremely minor amount of dust within the lens.
The lens barrel shows only the lightest cosmetic marks.
The focus ring is smooth and in great condition.
The lens mount is in good condition.

 

[Nod]

Can only guess that their condition form has boxes that need to be ticked (or rather questions that must be answered!) and that the options that apply to optics that contain glass have defaults as shown in this desription.

 

[gramps]

Always good to see an accurate description of condition

 

[Nod]

Always good to see an accurate description of condition

To be fair, it's probably not inaccurate!

.......this lens is in excellent condition with only the lightest signs of use. Have to take their word for that but it's probably right.
The optics are clean, clear with no marks or scratches. Hard to scratch the air, even if it's Chinese!
There is an extremely minor amount of dust within the lens. Most tubes have a few motes of dust inside, even when unpacked from new.
The lens barrel shows only the lightest cosmetic marks. Again, we'll have to take their word for that.
The focus ring is smooth and in great condition. Well, it has no nasty grinding noises as it focusses!!! (OK, that one's not accurate but I reckon anyone looking for an extension tube would know that.)
The lens mount is in good condition. Probably is.