Can someone explain this to me? my cell phone camera has photo size settings ( 0.3m- 640 by 480 -4:3 ) ( w 2.4 m -2048 x 1232 - 5:3 ) ( 3.2m 2048 x 1536 -4:3 ) ( w4m- 2560 x 1536- 5:3 ) and (5 m 2560 x 1920- 4:3 ). I'm clueless about these settings.