SVBONY SV229 140mm White-Light Solar Filter with Metal Cap (fits 118–159mm OD)

Product Overview

The SVBONY SV229 (W9183C) is a full-aperture white-light solar filter that fits over the front of a telescope. A polymer film in an aluminium frame cap gives a 140 mm aperture, and three metal clamping screws adjust the fit to tubes with an outer diameter of 118–159 mm. SVBONY states the filter conforms to ISO 12312-2:2015 and is certified by the American Astronomical Society; it rejects harmful ultraviolet and infrared radiation and shows the Sun in a natural orange colour.

Who It's For

This is a good match if you want to observe or photograph sunspots, granulation and solar eclipses in white light through a refractor or Maksutov in the 118–159 mm outer-diameter range.

Key Features & Design

• ISO 12312-2:2015: SVBONY states conformance and AAS certification.
• 140 mm aperture, 118–159 mm fit: an adjustable cap for a wide range of tube diameters.
• Aluminium frame: more stable and durable than a plastic cell.
• Three metal clamping screws: with protective plastic caps to grip the tube without marking it.
• Natural orange solar image: UV and IR are rejected.

Recommended Uses

• Sunspot and granulation observing in white light.
• Partial phases of solar eclipses and transits.
• White-light solar imaging with a camera at the focuser.

Compatibility and Accessory Notes

• Fit range: telescope outer diameter 118–159 mm.
• Listed by SVBONY for: SV48P 102, MK105, SV503 102 mm f/7 and SV550 122 mm f/7, and telescopes from other brands in the same diameter range.
• Smaller tubes: the 103 mm SV229 (W9183B) covers 80–118 mm outer diameters.

Measure the outside of your dew shield or tube front, or send us your telescope model, and we will confirm which SV229 fits.

What's in the Box

• SVBONY SV229 solar filter with metal cap
• 3 metal clamping screws with protective plastic caps
• 3 metal screw caps

Good to Know Before You Order

• Inspect before every use: SVBONY's guidance is to check the film each time and retire a filter that is damaged, torn, punctured or separated from its frame.
• Secure fit: the clamping screws hold the cap on the tube; SVBONY suggests tape as an extra measure if needed.
• Finder scopes: cover or remove the finder, or fit it with its own solar filter, before pointing at the Sun.
• Film appearance: at this diameter, slight wavy lines in the film are normal and do not affect the view.
• Weight: SVBONY does not publish a weight for this filter.

Frequently Asked Questions

Is it difficult to set up?

No. Slip the cap over the front of the tube and tighten the three clamping screws evenly until it sits snugly.

Will it fit my telescope?

It fits tubes with an outside diameter of 118–159 mm, measured where the cap will sit.

Can I use it for H-alpha?

No. It is a white-light filter showing sunspots and granulation; prominences need a dedicated H-alpha system.

Is it certified?

SVBONY states conformance to ISO 12312-2:2015 and AAS certification.

Bottom Line

In short: a 140 mm white-light solar filter cap in an aluminium frame that fits 118–159 mm tubes, for safe sunspot, eclipse and solar imaging sessions.