The only limit to field-stop size is the inside diameter of the eyepiece’s barrel. So, for example, a 20mm 2″ eyepiece will show more sky than a 20mm 1¼” eyepiece through the same telescope.

With four eyepieces – two 20mm and two 4mm, the user can customize to observe different celestial objects. Celestron also includes a travel tripod, a free download of Celestron’s astronomy software, ...

【Dual-Color Illumination and Flip-Up Lens Covers 】： The UUQ rifle scope has five brightness and magnification levels of 3x to 9x, providing clear long-range shooting with excellent optics ...

15 or 20 mm or Weighting can be Based on Average of Entire Frame Non-CPU Lenses Use 12 mm Circle Spot Meters 4 mm Circle About 1.5% of Frame Centered on Selected Focus Point On Center Focus Point When ...