Celticbird 1.25 Inch Light Pollution Filter for Telescope Perfect for Deep Sky Visual Astronomical Photography Metal Frame Optical Glass

Help to improve the visibility of deep sky objects by blocking out the mercury vapor, sodium vapor, and other such emission lines from artificial or natural sources which contribute to light pollution Help to Improve contrast on reddish planetary detail. Works well in telescopes of all apertures Fits all standard sized 1.25" eyepieces and accessories and can be threaded on both sides for stacking with other filters if necessary Comes with sturdy plastic case-proect the eyepiece from dust and moisture Packaged with a plastic box to protect your astronomy filter from dust and moisture, also it is easy to carry and storage