ND Filter Question ?

[BWM]

I am going to get a LightCraft Fader ND for my 67 mm Tamron on my 60d.

I am not sure if I should order a 67mm fader or a 77mm one.

If I got the 77 would that help prevent vignetting or is it just insurance if i get more lenses in the 77mm range?

Thanks, any help / advice is appreciated !

 

[*Fujative*]

Then just order the 77mm and get set up rings, that will be fine.

 

[TijmenDal]

QFE