Help Choosing | Seymour Solar

Most mistakes are sizing mistakes. Slip-on filters are chosen by the outer diameter (OD) at the front of the device (not the lens thread marking). Start with Sizing & Fit if you’re unsure where to measure.

Start Here

I know my device

Fastest path when you know what equipment you own.

Choose your device type and shop the right category.

Shop by Device Sizing & Fit

I know what I want to do

Best when you’re choosing between viewing, photography, or DIY.

Pick your goal and jump to the right product category.

Shop by Use Photography Basics

Quick Shortcuts

Telescope Solar Filters

Finished, ready-to-use slip-on filters for telescope optical tubes.

Shop Telescope Filters Safety

Camera Lens Solar Filters

Slip-on filters for solar photography sized by OD.

Shop Camera Filters Photography

Binocular Filter Pairs

Matched pairs — one filter per barrel.

Shop Binocular Pairs Sizing

DIY Film Sheets

ND5 film sheets for custom builds and classroom projects.

Shop Film Sheets Safety

Want to choose by format instead? See Shop by Product Type.

Guides (Recommended)

Still Not Sure?

We can help confirm fit. If you share your device model and a front-barrel OD measurement, we can help you choose the right size.

Contact Support before ordering if you want a quick check.