The Celestron NeXYZ Universal 3-Axis Smartphone Adapter lets you turn your spotting scope, telescope, binocular, monocular or microscope into a lens for any smartphone camera, even for larger varieties like the iPhone 8 Plus! The adapter has three individual adjustment knobs for the X, Y and Z axes, allowing precise alignment between your phone camera and the eyepiece of your optic. The adapter can fit around eyepieces between 30 mm and 60 mm in diameter and includes two adapter rings for microscope eyepieces.Perfect for capturing images and videos with confidence and it takes 30 seconds to set it all up! Features and specifications A universal smartphone adapater NexYZ fits telescopes, spotting scopes, binoculars, monoculars, and microscopes but it does not fit riflescopes NexYZ fits any eyepiece from 35 mm to 60 mm in diameter including telescopes with 1.25 and 2-inch eyepieces, spotting scopes, monoculars,and binoculars Includes two expandable adapter rings for microscope eyepieces, takes down the diameter to 25mm NexYZ stands up to rigorous field use Robust, durable construction with a metal frame and polymer body Accommodates a huge range of smartphones, the phone plat, making sure the bottom is touching the rubber base. Release the slider. Your phone is now secure and ready for imaging. Align and Shoot Open your camera app. Position your phone over the eyepiece using the X and Y axis knobs. Then, use the Z axis knob to move closer or further away from the eyepiece until you have achieved your desired framing. Finally, adjust the focus using the focuser on your optics and snap the image. Take a look!