Hello all, I want to shoot long exposures during the day, and as I was looking for how to. I ended up understanding there are filters that are out there which would do the job. 1. I have made up my mind to go for the Square/Rectangular Filter rather than the screw in type. 2. I own a Canon 10-18 Wide-angle lens, that has a diameter of 67mm. This might sound really silly, but If I want to buy the filter system for example: Lee Filters, I saw they have 2 options: 1. Seven5 Starter kit 2. 100mm Starter kit. My confusion is, along with those kit, should I buy 67mm Adapter ring?