67mm variable filters

[Sean Setters]

My suggestion is to not buy a 67mm Variable ND filter. Buy a 77mm ND filter and use step-up rings to fit the lens with the 67mm filter threads.

A 77mm filter will prove far more versatile. On that, I highly recommend the Singh-Ray Vari-NDs. I've had three different types of variable ND filters, and Singh-Ray is by far the best. It's costly, but worth every penny.

[Squidy]

Sean, thanks for your reply.

Considering I'm still a novice and don't understand the benefits of the 77 on a 67mm lens, could you please explain the reason for this? Is it to reduce vignetting etc or does it have another purpose?

Also, given the lens isn't an L series or a high quality lens would you still recommend the Singh?