$8.99 (as of 16/01/2021 08:05 PST details )
Features:
- Pack of 5 solar filter observation cards, 1 x4 filter window, 3 x5 card frame.
- Suitable for naked eye observation of solar eclipses, large sunspots, Venus Mercury transists without a telescope.
- The sun will appear in a natural orange color when viewed through this filter.
- Black polymer is the most common filtering material for observing the sun safely.
- These viewers are a quality product of Thousand Oaks Optical, Arizona, USA. A manufacturer of safe solar filters for over 30 years.