Best Filter Thread for both Sigma 18-35+50-100?

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Wildabobalore Forum Member • Posts: 60
Best Filter Thread for both Sigma 18-35+50-100?

I've settled on the Sigma 18-35 and the 50-100 as my two workhorse lenses. I do a lot of video so an ND Filter for me is a must.

My question is does anyone have experience using one filter for both lenses? As the 18-35 is a 72mm thread and the 50-100 is 82mm.

Will an 82mm filter with step down rings cause vignetting on the 18-35? Or alternatively, I'm sure the 72mm with step up rings will vignette on the 50-100. Would a 77mm be the best compromise, or am I just stuck needing to buy two separate filters altogether?

Any advice on the matter is greatly appreciated.

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