SV241 Pro has 3-Axis precise adjustment. Precisely adjust X,Y,Z three axes. It is compatible with most mobile phones. Z axis adjustment helps get the correct eye relief to capture the clear images and videos of celestral objects with your smartphone like never before. This mobile phone holder can be used for telescopes with an outer diameter range of 28-48mm. The SV214 Pro 3-axis universal smartphone adapter is compatible with almost any brand/model of iPhone/Android smartphone (width 55mm-105mm). Made of rigid aluminum alloy, doesn't bend, tilt or warp, holds your cellphone tight and perpendicular to the telescope eyepiece. EVA pads on eyepiece clip and phone clip protect equipment from wear and tear. 1.25 inch phone adapter suitable for 1.25"small eyepieces, 2 inch phone adapter applicable to large eyepiece. The digiscoping adapter can compatible with many telescope, like binoculars, microscopes, monocular telescope. Adjust the eyepiece clip and mobile phone clip to the appropriate position. You can use this mobile phone holder for astronomical observation and animal watching. 1.25 inch moon filter reduce the amount of light entering the eyepiece and increase the eyepiece contrast. The moon filter reduces the glare;allowing transmission of only 13 percent of the reflected ligh;which means you can see the surface more clearly and study the Moon in greater comfort.