First adjust the focus, then aim the lens at the target, observe through the glasses and adjust the focus until it is clear. 

(1)Please check to make sure you have installed 1.5V 6*AA battery. Do not use inferior batteries as their voltage is lower than 1.5V. (We recommend brands like Energizer, Duracell, AmazonBasics, etc.). (2)Make sure the polarity is correct and the contact with the spring is normal. (3)Press and hold the power button for at least 3 seconds to power on. (4)If it still cannot be turned on after 1-3 steps, please try to use a power bank. 

Yes, the Spotscope is compatible with all Android (latest) smartphones and iPhones. 

Yes, I'm sure it can, but not know what type of holder you have I can't commit to that 100%. It has a typical head, but any adapter or quick release could work, no harm in ordering and returning if you don't like, but only if shipping is free to you. Really nicely done set of sticks but I'm used to modifying things on the whim so that's where my sureness comes in. 

This monocular is very useful to look faraway. My kids love it very much and use it to watch the airplane and the seagulls flying through the sky.