- sky glow
- light pollution filter
even though i live several miles from a city still have alot of sky glow from the SW. celestrons light pollution filter was just what i needed. clean sharp views. ordered from OPT fast free shipping.will be making more purchases from OPT in the future
This filter has a narrow notch at OIII and Hb and another one at Ha. With an eyepiece with a focal length of greater than 5.5 times the f-stop of your telescope you should be able to see the Veil Nebulae C33/34 under dark skies. Very nice.