SVBONY 1.25" fully coated eyepiece is perfect for broad field lunar observations medium sized star clusters and wide range of cloudy nebulas;deep sky targets. New to star gazing and didn't know what you need to satisfy your needs;here is something can help you make an educated decision;things to consider. Make sure that you know your telescope and how to calculate the optimal magnification for the objects you wish to view;the magnification equation:Magnification=objective focal length/eyepiece focal length. SV139 1.25" Neutral Density ND filter reduces glare so you can see more lunar detail and surface features with your telescope. ND0.9 filter perfects for viewing Last Quarter Moon: 3 weeks after new; we again can see half of the illuminated part; this is usually called last quarter; Quarter Moon-a week after the new moon; when the Moon has completed about a quarter of its turn around the Earth;we can see half of the illuminated part; that is; a quarter of the Moon;this is the first quarter phase; it's very good effect to use the ND0.9 filter In this two time period.