Optolong Astronomy Filter - The Difference a Light Pollution Filter Makes π² Trevor, owner of AstroBackyard has recently reviewed the Optolong L-Pro filter on his blog. Click the link in my bio
![Optolong L-Pro Filter 1.25" / 36mm / 2" (48mm) (FREE International Shipping + FREE LensPen) - Cyclops Optics Optolong L-Pro Filter 1.25" / 36mm / 2" (48mm) (FREE International Shipping + FREE LensPen) - Cyclops Optics](https://cdn10.bigcommerce.com/s-9ezuz/product_images/uploaded_images/ngc6559-jerry-huang.jpg)
Optolong L-Pro Filter 1.25" / 36mm / 2" (48mm) (FREE International Shipping + FREE LensPen) - Cyclops Optics
![Optolong L-Pro clip filter EOS review - DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging - Cloudy Nights Optolong L-Pro clip filter EOS review - DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging - Cloudy Nights](https://www.cloudynights.com/uploads/monthly_06_2019/post-305019-0-72855900-1559503130.jpg)