Optolong H-Alpha 7nm Imaging Filter - 1.25" - HA-7-125 Lunt Ha Solar Filters The 12 mm Spacer Ring

The 12 mm Spacer Ring works best with RASA 8 for many Atik cameras

travel/camping life

Canon EOS 550D

5kg)(Optional) Operation temperature -20ºC ~ 40ºC (hand controller -10ºC ~ 40ºC) Warranty Two year limited * 200mm

8” CMOS IMX678

Optolong H-Alpha 7nm Imaging Filter - 1.25" - HA-7-125 Lunt Ha Solar Filters The 12 mm Spacer RingThe Optolong H Alpha 7nm Narrowband Imaging Filter is the popular filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i. e. skyglow). Better choice of