The top light in my microscope burned out and so all the pictures are light from the side with a handheld flashlight while trying to hold my camera steady and focused through the eyepiece .
For example , if you were using an eyepiece with a 50 degree apparent field , and the power of the telescope with this eyepiece was 100x , then the field of view would be 0.5 degrees ( 50 / 100 = 0.5 ) .
Furthermore , in 2007 , john frean at the national institute for communicable diseases , sandringham , south africa , showed that the cameras integrated into many cellphones can capture relatively good quality images of tissue samples simply by holding them against the eyepiece of a light microscope .