SolBeach

I want to THANK all who replied. Again if I knew what I was doing I would not be posting here. I have the older 1000mm model which rotates the whole barrel to focus and it came with 26mm eyepiece If I were to get a 4mm eyepiece, about how much total or additional magnification would I see?

I have a 20+ yo Celestron C90 & I know nothing about any technical details about scopes or optics. An osprey nest is about 1 mile from my house with clear direct line of sight to it. The nest sits atop a 25ft utility pole that is only a few feet above sea level. My house is on a hill at about 100ft above sea level & has a slight downwards view of the nest. I want a new telescope that will present the nest about 4+ times larger than my C90. What are some recommendations?