- H-alpha 7nm 31mm Filter
- A threaded version of this filter is pictured. Actual product is a 31mm unmounted filter
- A very narrow emission-line filter
- Permits a 7nm bandwidth of light (focused on the 656nm wavelength) through
- Blocks transmission of contrast-killing light pollution wavelengths
Sale!
Optolong 31mm H-Alpha 7nm Filter
Original price was: $133.00.$75.16Current price is: $75.16.
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