You are perfect. The quality is top notch and they never make me feel like they are slipping off because they are so snug. Below is the Tiltas website. Surprisingly they didn't have a Sigma 18-35 which is very strange considering they have other Sigma lenses so I'll save you some time and say the 75-77mm with 18-35 and Canon 17-55 2.8 works. . None of these were on the website but I took a chance based on a risky math lol Great product and I will end up getting them for all my lenses.
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