Lense Diameter/Filter Size Marking

[fatsheep]

This might be a bit of a stupid question but I just wanted to make sure... On a camera lens, the circle with the slash through it followed by a number indicates diameter and filter size right?

(I did a google search and I found hintings at this but nothing really definitive)

 

[nicfargo]

Yes, that is correct.

 

[fatsheep]

Yes, that is correct.

Thanks.

 

[Sideburns]

Not really the diameter...only the filter size.

 

[fatsheep]

Not really the diameter...only the filter size.

Could you point me to a source?