SVBONY SV115 Telescope Filter O-III Filter Narrowband Cuts Light Pollution Filter for Astronomy Telescope (2 inch)

A well made filter that that really tones the light down in the light polluted skies. Excellent value.

Works well. Able to see nebulae quite well.

This works great! SvBony is building a great reputation here. Love their products.

I went from wondering if there was really an owl nebula there to being able to clearly define the nebula straight on in sub par skies. When using averted vision, I could occasionally make out the "eyes" in my 10" dob. Filter offers substantial improvement for cost.

Some folks shy away from 1.25 oiii's but the key is exit pupil...on a lower power eyepiece this one is surprisingly good.