Telescopes
Slip-on solar filters sized to your telescope’s front tube OD for safe white-light viewing.
Shop by Device: Find the Right Solar Filter for Your Gear
This page exists to help customers quickly choose the right front-mounted solar filter path based on what they already own (telescope, camera lens, binoculars, or spotting scope). Seymour Solar filters are sized to the outer diameter (OD) at the front of your device—so choosing the right category first prevents sizing mistakes and returns.
Front-mounted only.
Always use a secure filter installed on the front of your optic. Never use eyepiece/behind-the-lens solar filters. Review safe setup and inspection before first use: Solar Filter Safety.
Choose Your Device
Spotting Scopes
Slip-on filters sized to the objective housing OD (the front barrel). Great for daytime outreach and field optics.
Camera Lenses
Slip-on solar filters for many telephoto lenses and hoods—front-mounted for solar photography in white light.
Binoculars
Matched pairs (one filter per barrel). Both barrels must match OD for a secure, safe fit.
DIY / Custom Build Sheets
ND5 solar filter sheets for building custom front-mounted cells and specialty applications.
New to Solar?
Start here if you’re unsure what you need. Learn sizing, selection, and safe front-mounted use.
Not Sure What You Need?
Most issues come from measuring the wrong surface. Slip-on filters fit the outer diameter (OD) at the very front of your device (objective housing / lens hood / front tube).
- Telescopes: measure the front tube OD (not the aperture).
- Spotting scopes: measure the front objective housing OD.
- Camera lenses: measure the lens hood/front barrel OD for slip-on filters.
- Binoculars: measure one barrel OD and confirm both barrels match.
Safety Reminder
Inspect your filter before every use. Do not use a damaged filter. Confirm the filter is secure before pointing any optic at the Sun. Review full guidance here: Solar Filter Safety.