Telescope Filter 80–250 mm, Nine Size Options

✅ Start from the label. Nine options are marked from 80 mm to 250 mm, so begin with the label that suits your instrument.

✅ Confirm the fit. The label alone does not give the mounting diameter or transmission, so check what it measures on your scope.

✅ Keep it off the Sun. Direct solar viewing is unverified with this filter, so use it away from the Sun, including during an eclipse.

Nine Size Labels to Compare Before You Order

A telescope filter accessory offered in nine size options labelled from 80 mm to 250 mm, for comparing against the marking on your instrument. The label does not establish the mounting diameter or the optical transmission, so measure before you choose. Do not use it to look at the Sun through a telescope, including during an eclipse.

Technical details

• Size options are listed by their labels.
• The label alone does not establish the mounting diameter or optical transmission.
• Suitability for direct solar viewing is unverified.
• Do not use this filter to look at the Sun through a telescope, including during an eclipse.

Measure the marking on your telescope, then pick the size label that matches.