SVBONY SV115 O-III Filter Narrowband Cuts Light Pollution Filter for Astronomy Telescope (2 inch)
SVBONY SV115 O-III Filter Narrowband Cuts Light Pollution Filter for Astronomy Telescope (2 inch)
Lowest in 30 Days
$59.74
$69.99
$15%
This is great price to buy!
These’s 85% probability of this price will increase soon.
Our advice is to buy.
Lowest
8 months ago
Average
Now $12.27 less
Highest
3 months ago
Price History
- The O-III filter completely blocks virtually all other visible wavelengths of light so views of nebulas are optimized; increases contrast through selective filtration-Anti-reflection coated to prevent glaring and ghosting
- The filter made from high-grade glass with dichroic interference and antireflection coatings; not only useful at light-polluted sites; the contrast is also increased at dark sky sites; it can be used with all 2" eyepieces
- Narrowband filter do not eliminate the effects of light pollution or increase the object's brightness; in many cases, they increase the contrast between nebula and night sky, not brightening the nebula
- The 2" O-III filter useful for large aperture telescopes through which the light of the moon can be extremely overwhelming; allowing just for the Double Ionized Oxygen lines between 495.9nm to 500.7nm to pass through at 90%
- Astrophotographic; the filter enhances contrast during visual observation of gaseous and planetary nebulae in all sky conditions; 2" filter allows high-contrast imaging even in areas with strong light pollution