![Lunt 50mm tunable H-alpha filter with 18mm blocking filter for scopes under 1800mm focal length | Astronomics.com Lunt 50mm tunable H-alpha filter with 18mm blocking filter for scopes under 1800mm focal length | Astronomics.com](https://www.astronomics.com/media/catalog/product/cache/1/image/767x1014/9df78eab33525d08d6e5fb8d27136e95/1/6/16552.jpg)
Lunt 50mm tunable H-alpha filter with 18mm blocking filter for scopes under 1800mm focal length | Astronomics.com
![Amazon.com : Astromania 2" Narrowband NBPF Hydrogen-a 12nm Filter - Enhances The Contrast Between Object and Sky - Allows You to Take Images Even Under Urban Skies : Electronics Amazon.com : Astromania 2" Narrowband NBPF Hydrogen-a 12nm Filter - Enhances The Contrast Between Object and Sky - Allows You to Take Images Even Under Urban Skies : Electronics](https://m.media-amazon.com/images/I/61EuEAOmrUL.jpg)
Amazon.com : Astromania 2" Narrowband NBPF Hydrogen-a 12nm Filter - Enhances The Contrast Between Object and Sky - Allows You to Take Images Even Under Urban Skies : Electronics
![Lunt 50mm tunable H-alpha filter 2" diagonal 18mm blocking filter for scopes under 1800mm focal length | Astronomics.com Lunt 50mm tunable H-alpha filter 2" diagonal 18mm blocking filter for scopes under 1800mm focal length | Astronomics.com](https://www.astronomics.com/media/catalog/product/cache/1/image/767x1014/9df78eab33525d08d6e5fb8d27136e95/2/0/20257.jpg)