Would this also work for non-Apple phones? The article seems to be very specific about only mentioning iThings. Is there something about them the others don't have that is required for this?
The iThing specificness probably comes from the dimensions of the stand you need to make to hold the phone.
Just tried holding the 15mm eyepiece off my old school microscope (optical) in front of the lens on my blackberry. The Thinkpad trackpoint fills the circular image field nicely (and it shows all the crud down there, so I'm cleaning it out with a brush now). Very sensitive to having the axes coincident.
Anyone any idea about the focal length of the LED pointer lens?
